A lesson in biology and intimacy

The Crystal Empire, over a thousand years before the return of Nightmare Moon...

Once upon a time, there was a single empire located within in the lands of tundra, where everything was covered with snow. There, in the middle of said lands, laid the city of the Crystal Ponies. For it would fall for nearly the whole year, the snow was all its people knew, but never once had they suffered from it, as they had a magical barrier safeguarding the kingdom, protecting its denizens from the cold, snow, and any monsters that dared to invade their most wondrous city.

They were ruled by only a single king, who had no queen to rule alongside him. However, he did have one daughter, a filly that he truly cared for. He cherished her so much, that he never allowed her to go outside, choosing to keep her safe within the crystal castle, where she would always be kept under constant vigil. This failed to stop the ever curious filly, who always found a way to escape from her room and elude her personal guard many a times. One day, the daring filly did so, continuing well beyond where she ever dared to go before, soon venturing to the edge of the barrier to her father’s city.

It was here that she noticed something outside the barrier, something easily visible within the vast, white expanse of the outside world, of which she knew very little of. Once she gathered up enough of her courage, she walked through the barrier to investigate what it was and was surprised to discover it to be young, gray-coated, black-maned colt laying in the freezing snow. With one good look, she already determined him to be so unlike any colt she knew; for one, unlike hers, his fur didn’t sparkle like crystal, and he had a pointy horn atop his head.

Seeing that the colt seemed to still be awake, she decided to speak to him.

"Hello, stranger," she greeted.

"H-Hello?...." the colt answered moments later as he continued to lay deathly still, speaking in a voice that lacked both energy and hope.

Looking down curiously at him, the filly hoped she didn't come off as rude as she then asked, "What kind of pony are you? I’ve...I've never seen anypony like you before."

"I'm...I'm a unicorn," he listlessly said before slowly opening his tired eyes, setting his dreary, hazy sights on her for the first time. Her coat was almost as white as the surrounding snow, making it difficult for the colt to spot her at first, and her long mane, blue as the clear sky, glistened like the star-filled night. "Are...are you an Earth pony?" he soon asked.

Puzzled, the filly cocked her head to the side in curiosity. "Earth pony, what's that? I am a Crystal Pony."

"Crystal Pony?" the colt repeated in a near whisper as his eyes closed on their own, the cold's creeping sting sapping his strength to reopen them. "Never...never heard of that before..."

"Why are you out here alone in the snow? Is it comfortable sleeping on it like this?" the filly asked bright and innocently.

His mind blurring, the colt barely shook his head, the filly's voice being the only thing keeping him from losing consciousness.

"N-No...I'm...I'm lost... Snow...snow fell everywhere when the Windegos attacked my village... I...I ran away from them... I ran and ran until I ended up here... I'm tired...and I think I'll freeze to death out here..."

Oh! Well...freezing to death would probably be bad, the filly thought.

"Mmm...do you want to stay at my house for a while?" she offered. "It isn't that far from here, and we have a fireplace."

"That sounds nice," the colt said almost dreamily," but...I have no strength left to walk..." True to his words, he tried to get up, but found that he couldn’t even feel his legs, let alone move them.

"That’s alright! I'll carry you!" the filly said as she puffed up her chest. After carefully hoisting his limp body onto her back, she turned to the direction of the city and began to tramp forward through the snow. "By the way, what's your name?" she then asked as they went straight past the barrier.

His lifeless limbs bobbing with every step she took, he answered her.

"I'm...I'm Sombra... Just Sombra..."

Glad to make a new friend, the filly beamed a big and cheerful smile.

"Nice to meet you, Sombra! I'm Crystal Heart!"

Ten years later, within the Crystal Empire's garrison...

"Alright, that's enough out of you all for today--dismissed!" General Sombra exclaimed, relieving his Crystal guards from the training ground after dragging them all through a vigorous, physically-demanding drill session. Unlike the rest of them, Sombra barely broke a sweat beneath his armor, proving to him that he would have to ramp up the newcomers' training within the coming days if they were to be whipped into proper shape fit for the guard. Right as the last participant limped out of the area, and the general himself was about to leave, he halted in place when he heard the familiar voice of somepony calling to him from behind.

"And how well were your new recruits doing in today's training, Sombra?" Crystal Heart asked, her voice sweet and crystal clear as she stepped out from around a wall, garbed in her royal shoes, cloak, and crown.

"Everything is fine, milady," he replied as he turned back to her. "Hmm, and how exactly did you manage to leave your tower again this time?" Despite saying that in a monotonous tone, which indicated that he wasn’t pleased with the princess leaving the safety of her tower, his smile betrayed his words, as he was actually pleased to see her regardless.

"Oh I just snuck out while the guard wasn’t watching the door," Crystal Heart answered nonchalantly as she approached him with a smile.

Returning the smile with one of his own, Sombra lowered his head a bit and shook it mirthfully.

"Heh, your father would be pretty mad if he knew; probably get me and my guard in trouble...again... You uh, you do know it's my duty to bring you back to him, right?"

"Oh, but what about your lover's duty? Are you not obligated to allow your marefriend some freedom outside the tower?" she asked as she leaned forward, nearing her face to his before casting him adorably big eyes that could melt the heart of everypony’s who dared gaze upon them.

He tried to resist, he really did, but the truth was that he could never say no to that face, as it belonged to the same mare--filly then--who saved him ten years ago...

"Eh, ahem. T-True," he coughed out, trying to sound as if her eyes had no affect on him. "So where do you want to go this time, Crystal?"

"Oh, somewhere where I can be alone for a while with my secret coltfriend," she whispered with a wink, hooking her foreleg under his before pulling him along out of the training ground. "Come on, let's head to our secret place!"

Minutes later, after Crystal guided Sombra by the hoof as they evasively eluded many of the castle's inner guards and patrols--of which their schedules and routes she knew by heart--the two soon made it to the very top of the royal home.

"Huh, I still wonder how nopony knows that we have a secret base located just above the Crystal Castle!" Crystal Heart said as she walked close enough to the edge to get a magnificent view of the entire empire.

Patting his shiny armor of imaginary dust, Sombra spoke with a monotone voice, yet a proud expression. "Hmm, probably because nopony's able to use the art of dark magic like me, and even if they did find the stairs shrouded in the shadows of the throne, they'd still have to walk down the world's longest staircase, pass the door of their deepest, darkest fears, then walk up the long staircase...again!"

"Uh huh!" Crystal agreed with an eager nod. "You're so thoughtful Sombra, definitely a genius!"

Well, thoughtful wasn't exactly what he had in mind when he came up with the seemingly infinite stairs... Wicked, now that was a closer fit; just a bit of fun he'd have at the expense of any would-be interlopers.

"Hey, I only wanted to create a place where you can hide from all your duties and have some freedom," he said with a shrug. "A place where you can see the view of your beloved empire with complete independence."

Unable to hide her blush, Crystal smiled at that. "You...you've done so much for me..."

Placing his hoof under her chin, Sombra looked her in the eyes as he then said, "Anything for you, my Crystal..."

Her eyes widening and face reddening, Crystal Heart's, well, heart throbbed within her chest. That was it, that was all the encouragement she needed to take this next leap.

"Um, Sombra..." she said as she gently moved his hoof aside.

Noticing a change in her demeanor, Sombra tilted his head a bit to the side. "Huh, yes?"

"You said you'd do anything for me, right?" Shortly after asking that, she began removing the jewel brooch holding both ends of her cloak over her neck before slowly removing the garment.

Wondering if perhaps the thick clothing had somehow gotten her hot despite the cool weather, Sombra answered her, speaking professionally, yet from the heart.

"Yes, of course. You mean everything to me, you've saved my life after all; it's always been rightfully yours."

"Well..." Finally removing the cloak from herself, as well as revealing her blank flank to him, of which she was somewhat ashamed of since she still didn't have one at her age, Crystal spread the cloth neatly on the floor, then began removing her crown and shoes.

"P...P-Princess!?" Sombra soon yelled in shock, his professionalism shattered by what he was seeing her do. "W...W-What are you doing!?"

There, completely nude, Crystal Heart proceeded to slowly lay atop the cloak, sprawling herself onto her back as she spread her hind legs eagle, revealing everything to her general...

"We've... We've loved each other for so long, Sombra. I...I think this is the right time to do this...

"T-Time for what!?" he questioned, looking at her in disbelief. He was merely her general, she was his princess! He knew it wasn't within his station to gaze at her in such a display, but he just couldn't tear his eyes away, especially from the pure pink of her virgin marehood's slit!

This wasn’t the first time Sombra saw a mare's vagina, as he wasn’t new to sex; being a general, as well as the only unicorn in the crystal empire, made him exceedingly popular amongst the Crystal pony mares. In fact, he used to be rather intimate with quite a few of them before putting that all to halt when he became the princess' secret lover. But to see Crystal Heart, his princess like this...it was as if it were an entirely new experience...

"Time...time for you to take me, Sombra," Crystal Heart said with confidence, despite gazing at him with an intense blush. She was embarrassed to lay in such a lewd pose like this in front of a stallion, but she'd do it for Sombra.

"But princess! You simply can't!" Sombra pleaded with a shake of his head. "Please, save your virginity! You must keep yourself pure... You...you shouldn't do something like this...not with some somepony so beneath you like me..."

"No, Sombra," she softly replied, shaking her own head. "You said that I’m just a normal pony to you... Well, in this place, I'm not a princess, but just one ordinary mare... Is this...is this not something that normal ponies would do?" Hoping to win him over, she then gave him big, hopeful eyes as she then said, "Please...I want it. I want to feel it... I...I want to do it with you, Sombra..."

Once again, Sombra couldn't resist that face, but he was conflicted as to whether or not he should give in to her... On one hoof, his inner general was telling him that it is wrong for him to lay with his princess, but on the other, his lover side knew that this was something he should do with the mare he loves. Besides, it wasn't like he never wished to do something like this with her before...

After allowing his opposing feelings to battle it out, Sombra came to a decision.

"Alright...I'll...I'll do as you please then, my sweet Crystal."

Slowly laying down upon Crystal Heart’s body, he crawled up her until his eyes were looking down deeply into hers, starting their little game by gently lowering his head to kiss her.

"Mmm," Cyrstal hummed into his mouth once her lips met her lover's. The kiss started off innocently enough, just a simple yet passionate smooch to get their bearings that gradually grew more heated as time went on, Sombra adding more and more of his tongue until it soon worked its way into her waiting mouth where it danced around hers. The unfamiliar sensation brought about by the pressing of lips and wet embrace of their tongues revealed a strange new pleasure to Crystal Heart, enticing her to moan throughout her throat until Sombra pulled back, breaking their kiss apart.

"How was it?" he asked, hoping he didn't progress things a little too quickly for her.

Hoof on her pounding chest, Crystal instinctively swallowed before answering him. "It felt...nice... What was that you just did?" She really had no clue, as she had never been kissed before. Nevertheless, she enjoyed it very much.

"It was a kiss," he answered matter-of-factly before giving her a quizzical look. "You know, a simple act shared between couples. What, you didn’t know about it?"

Crystal Heart shook her head. "I...I never knew... My father always made sure that I knew nothing about intimate relations..."

Unlike other mares, she didn't go to school like ordinary ponies. Instead, her father appointed her a personal teacher, one who was only allowed to teach what the king himself approved of; even with the books in her tower, what limited information she could find was heavily edited.

Raising a brow, Sombra asked, "So how'd you know about sex then? And how much do you know exactly?"

"Oh, I uh...I found a biology book once when I escaped from my tower and went to the royal library... It was about...animal mating... Apparently male animals have this thing called a penis, and when they insert it into a female's vagina, they make new life." Her face flushing with a new wave of embarrassment, she lowered her gaze as she then said nervously, "And, well...since I have a vagina...and you're a male, so you must have a penis...I thought...maybe I can do something like that with you..."

Seeing just how innocent and sheltered his princess was and how hard she tried to hide it, Sombra couldn't help but smile.

"So I'm assuming that means you know nothing about foreplay?"

"Foreplay, what's that?" she asked as her ears perked in interest, curious with this unfamiliar word.

"It's how a stallion prepares his mare for sex, and it also makes the mare feel really nice too. Here, let me show you." After licking his right hoof until it was coated with his saliva, he softly pressed it over her marehood and began sensually rubbing her pink lower lips, causing his lover to lustfully moan as a result.

"A-Ah...you're...you're rubbing me there?" Crystal Heart questioned through her stifled moans, overwhelmed by this strange new pleasure surging through her body. She never knew that touching the vagina like this could ever feel so pleasant. Growing up, her maid always told her to never touch it, always making sure that Crystal was assisted in the bath, as well as cleaned after she was done with her personal business in the toilet.

"Hmm, does it feel good for you?" Sombra asked, continuing his hoof stokes as he gazed upon her satisfied face. Crystal Heart didn't answer, as her body was so wracked with bliss that it was difficult for her to say anything coherent. Instead, she simply replied with a small, shaky nod. Smiling at that, Sombra smiled as he leaned in and kissed her once more, further assaulting her senses with more pleasure by continuing to stimulate her lower area with his hoof.

A minute later, Sombra pulled back from the kiss, his hoof ceasing its caressing yet remaining over her marehood.

"Did you know that I can make you feel greater pleasure?" he asked. "Even better than my hoof? Do you want to experience that, my sweet Crystal?"

Allowed a small break from the constant barrage of mind-numbing pleasure, Crystal whispered her answer.

"Please...don’t stop... I...I want more..." She didn't wish for this respite, all she wanted was for him to touch her again.

Smiling at that response, Sombra gave her lips a quick kiss again before slowly moving down her body, his head down towards her nethers. As he did this, Crystal Heart opened her eyes and gazed down at Sombra, curious as to what he was doing. Moments later, once his head was positioned between her hind legs, she soon jolted while giving a pleasure-filled squeal when she suddenly felt him lick her soaked lower lips.

"Ah! S...Sombra," she called, her voice shaking with passionate lust born from the assault of her lover's tongue. "Why are you--mmm...l-licking me t-there?"

Enjoying the sweet taste of Crystal's nectar as he gently licked at her labia with broad stokes of his tongue, Sombra explained. "This act is called oral sex, my sweet Crystal. Or, as ponies bluntly call it, 'eating out.' It's only one of many acts of sexual foreplay."

"Bu...but my vagina...it's--hmm--it's dirty! I...I pee from there...ah...you...you shouldn't be licking it..."

Even if she asked him to stop, her mind and body said the opposite. He was right, it felt much better than his hoof, and she wished he would continue this forever.

"Don't worry, Crystal, it’s ok," he said in a whispered tone, his warm breath tickling her wet lower lips. "Everypony whose had a lover has done this; we're willing to get a little dirty if it means the pony we truly love feels happy and fulfilled." Returning his attention to servicing her, his licks began moving upward, coming across her winking clit wink before it hid beneath her folds. Placing his mouth over the area, he gently captured it with his lips when it reemerged, suckling on it and receiving a very much desired reaction from his lover.

"Ahhh!" she bellowed in an extreme pleasure-filled scream, eyes widening and back arching as she lose lost control of her voice for just a brief moment, causing Sombra to release that part of her body, as he was hoping he didn't go too far. Recovering from her blissful high, she then asked what he just did to her. "What...what did you just...?"

"That was your clitoris, my love," he explained, eyes still locked on it as he watched it continue to wink. He desired to suckle on it once more, but feared that such pleasure would be too much for his lover's first time. "It’s the most sensitive and pleasurable part of your body. Do...do you want me to touch it more?"

Despite his fears, Crystal really did want him to go on.

"Mhmm...y-yes, please... I...I want more..." Once he was given the go ahead, Sombra resumed were he left off, licking and suckling at her sensitive little nub over and over, Crystal releasing pleasure-filled screams with every wave of intense pleasure coursing throughout her body. "Ah! S-Sombra, oh Sombra~ Mmph... F-Faster...please...go faster!" she begged, knowing that Sombra would always be gentle and careful towards her, treating her like a glass crystal; always easy to break. This time however, she wanted him to be rougher with her, so she may experience stronger and even better sensations than what she was feeling right now. She believed she would, if only her lover’s tongue would move faster!

"As you wish, my princess," Sombra said, accepting his princess’s order, adding more force to his tongue as he proceeded to lick her marehood and clitoris at a faster pace.

To her delight, the following pleasure she received was stronger than before, and, unbeknownst to herself, making her reach her limit all the more sooner...

"Ah! I...I can...I can feel something...something strange! Something’s....something's going to happen with--within me!"

She didn't know what was happening, it felt as if something was going to explode in her, something her body wanted so desperately to happen. It just made her want to scream! She wanted to say something, something to call this building, coiling sensation so she may tell her lover and let him know just how desperately close she was. But she just didn't know the name for it!

As if reading her mind, Sombra answered that maddening question for her, the vibrations felt though her clit as he spoke.

"It's called an orgasm, Crystal."

"Ah...I...I see," she said. "Or--orgasm... Then...then I will orgasm s-soon, Sombra! I'm gonna...."

After giving a quick lap at her sex, Sombra looked up to her and shook his head, smiling as he did so. "No, no, Crystal. 'Orgasm' is too...formal. Instead, say 'I'm gonna cum'." Somehow, he just knew that hearing his pure, innocent lover saying something so dirty and unladylike would turn him on even further.

The pleasure reaching its tipping point, Crystal, without a second thought, immediately did so, screaming in utter bliss, "I'm...I'm gonna cum!" Saying that, the sensation within agonizingly grew stronger, absolutely unbearable. She so badly she wanted it to end, to know where this pleasure road would take her. Never in her life had she wanted something so desperately, and she hoped her lover would bring her to that end.

"Then...cum...." As soon as those words escaped his lips, he sucked her clit, hard, gently nibbling it as he licked at it from the inside of his salivating mouth.

That was it, that last action of his was all it took to finally take her over the edge.

"Oh! Oh Som--oh Somb-braaa~!" Screaming her lover’s name, the pressure of her pleasure gauge finally exploded, her body shaking as blissful gratification spread rapidly throughout her entire body. Her natural lubricant, her nectar, all came rushing out in a single uncontrollable spasm, Crystal unable to control over herself as her body continued to shake the entire time.

Gently lapping at her entrance, Sombra drank her sweet honey directly from its source, keeping Crystal in her blissful, heavenly state for as long as he could, not stopping until she eventually came back down from her own personal heaven and returned to him.

"So...so what should we do next?" Crystal soon asked after recovering, moving to sit on her haunches in excitement.

"Hmm," Sombra hummed to himself, thinking it over for a bit. "Perhaps you'd like to see a stallion’s tool first." Laying on his back atop the cloak, he slowly spread his hind legs apart, revealing his half-erected length along with his apple-sized balls to his lover.

Staring at his male set in awe, Crystal Heart reacted to it at first with with shock before her thoughts turned curious.

"Oh my...it's...it's so big...and really thick... Huh, but why is it so different from what I've seen in the biology book? The ones in there had a slimmer look to them and had something called a 'knot' at the base." She really was puzzled. Sure, the old biology book she had read earlier contained the mating habits and aspects of an animal called a dog, but she assumed that it was the same for all males, regardless of species.

"Well, my sweet," Sombra began, speaking as if giving a lecture to a student. "The shaft of the male penis varies greatly from race to race. Some are thin, while others are thick. Likewise, other races have extra features; some, like you thought, have a knots, while others have barbs. But this right here," he gestured at his own member, "is what a pony’s penis looks like. We all have a thick cock with a ring in the middle."

"Ooh," Crystal Heart uttered, astounded, her eyes fixated on the lesson's subject like a foal who just received a new toy. "Huh, but how come I've never seen one of these things before since it's between yours and all the other stallion's hind legs all the time?"

"Eh, that’s probably because it’s always hiding and being kept safe in the stallion's sheath when not in use," he answered simply with a shrug. "It'll only grow and come out when a stallion's aroused and ready for sex, like," blushing, he looked away and coughed into his hoof, finishing his sentence with, "like myself...."

"The detail of it...so complex," Crystal remarked, curiously examining his spire from multiple angles. "Can my small vagina really take something this big and thick inside it?" She'd be lying if she didn’t admit that her voice contained some sliver of fear in it when she asked that question.

Sombra calmly shook his head. "A mare’s vagina can stretch, my Crystal. Foals are born through it, and since foals are bigger than my cock, it's safe to assume that it'll do just fine." Despite saying that in a perfectly composed tone, Sombra's face betrayed him, as he shared the same fear as her. She was still new to all this, and if what he feared was correct, then if they were to go any further, the resulting pain from sex might cause her to back out or want to stop doing this with him. He was finding it increasingly difficult to resist his urges and stop right now before it came to that point, but he wanted her so badly as well...

"Cock?" Crystal repeated, looking up at him with a puzzled expression as she tilted her head a bit to the side. "You mean like a male chicken?" Somehow, this funny usage of the word allowed her to momentarily forget her fear, her pondering as to why he just refereed to his penis as a male rooster.

Wondering why Crystal suddenly appeared to be holding in laughter, Sombra explained. "It's just another name for a penis...just as pussy is another name for your vagina."

"Cat? Cat and chicken..." Cracking a smile, Crystal was unable to prevent a few stray giggles from escaping. Common ponies seem to have interesting and weird ways to making new meanings for words. Once she pictured the mental image of a cat being an intimate with a chicken, she burst out laughing, confusing Sombra tremendously as to why she was.

"Oh! Um, yeah...that’s a...that's pretty funny... Hmm, even I'm not sure why they call them by those names, but uh...anyway..." Nodding towards his standing stallionhood between his legs, he then asked, "Do you..mmm...do you want to touch it?" Secretly, he hoped she'd say yes...

"Can I?" she asked, her hoof already reaching for his black rod. Before she touched it however, she stopped, as she was still wasn't sure how highly sensitive it was.

"You may go ahead, my princess," Sombra said, wishing she'd quit teasing him. Mere moments later, that wish was granted. "Mmm...Crystal...." he muttered, his eyes closing in content as his lover finally began stroking his sensitive organ with a soft hoof. Her hoof, along with the rest of them, were always protected by her royal shoes, never making direct contact with the rough ground in her life and therefore making them softer than all the mares' he had ever been intimate with. However, even with how her soft hoof rubbed his hard length ever so gently, he felt that something was still missing...

"Does...does it feel good?" she soon asked in mid stroke, looking up at Sombra, as she was unsure if she was doing it right. Unlike herself when it was her turn, he didn't seem to be moaning in pleasure...

Opening his eyes, Sombra blinked at her before answering with a calm and collected, "No..." He wanted to tell her otherwise, to say she was doing a good job, but he knew that being honest was the only way she would learn.

Her expression dejected, Crystal Heart ceased her strokes before allowing her head to fall in low spirits, saddened that she was unable to make her lover feel just as nice as he did her...

"I’m...I'm sorry, Sombra... I just don't know how to do it..."

Feeling a tad regretful for putting her in such a sorry state, Sombra reached his hoof towards her, placed it under her chin, then lifted her head so he'd be able to look her in the eyes as he spoke. "Please, don't feel sad, my love. Your gentle touch is pleasing right now, but your hoof is just too dry. Its texture is simply too rough for my sensitive flesh, so you'll need to lube it up first."

"Lube? But how?" she asked, cocking her head in confusion. "We didn’t bring any water up here with us."

A touching sentiment as it was, water wasn't exactly what Sombra was thinking, as he learned, through his younger, more naive first years of dating, that the plenteous liquid itself provided little to no lucubration when it came to the more intimate activities. No, even if they had some, water was simply out of the question, so instead, they were going to use something available to them that Crystal herself probably wasn't even aware was an option.

"Crystal," Sombra said, raising his upper half atop his elbows before pointing to her sex, still soaked in her sweet nectar since she had just cummed not that long ago. "Please, gather some fluid from your pussy; your mare cum, that is what we'll use. Usually, it enables a male’s penis to slide more easily into a female's vagina, but it can also be used for this purpose."

"Hm?" Crystal sounded, her brain not making sense of his words until seconds later. "Oh! Y-Yes...my love." Having trouble at first with breaking her habit, she went against what was instilled into her since foalhood and soon moved her soft hoof over her soaked lower lips, pressing over them and making her body shudder once she began rubbing. Moaning in pleasure from her own inexperienced ministrations, she nearly forgot why she was doing this in the first place, as it felt so wonderful, much like when Sombra touched her there.

"I see you now know how to masturbate," Sombra jovially stated with a small chuckle, watching her stoke herself with hoof.

Blushing, she removed her soaked hoof away from herself, remembering why she was doing it in the first place; to please his rod properly. However, before she did so, she was once again enraptured and confused by the new word her lover used.

"What's masturbate?" she asked with curiosity, causing Sombra to puff out his nostrils in contained amusement.

"Masturbate means to pleasure yourself without having assistance from another, dear. And--o-oh..." With Crystal’s soft hoof establishing contact with his member again, he paused, her smiling at his reaction, as it seemed that she finally did something right.

"You're...you're doing very well now," he said lowly, his stallionhood throbbing and twitching in her hooves, "but...how about you try using both of your hooves, hmm, Crystal? Just place one on the left and the other on the right side of my cock, then try stroking them up and down."

"O...Ok," she answered softly before doing as he instructed, hooves soon stroking his soft yet strangely firm flesh, wondering whether or not this act had a name as well. She was just so eager to learn everything she could about sex, this new experience included. Gazing over her endeavor to look at him, she then asked, "Sombra...what I'm doing right now, what's it called?"

Her soft, massaging hooves bringing higher and higher amounts of pleasure to him via his rod, Sombra gave his reply through his bliss-filled grunts and moans. "If...if I were to do it with my own hooves, then...then it'd be called masturbation...just...just like what you did with your own hoof. Mph...but, if somepony does it for you, it's called a--ahh...a hoofjob..."

"A hoofjob?" she said with a growing smile upon hearing his answer, happy to see that she was finally helping her love experience sweet ecstasy. "Hmm, sounds about right to me~" she singsonged before Sombra felt a third sensation, other than his lover's hooves.

Eyes widening and teeth grit, Sombra's head pointed straight up. "A-Ah!!! C-Crystal... What...what are you doing?" Quickly reaverting his gaze downwards, he found her separating her lips from his cock's head after she had just kissed it.

"I'm sorry, Sombra," she apologized, both hooves still servicing him, her eyes sparkling with resolve and determination as she looked up to him. "I only wanted to give you the same amazing treatment you gave me. I...I want to do the 'oral sex' for you...to show you that I really do love you!"

Surprised by such confidence in her voice, Sombra softly nodded to her before looking upwards, trying to hide his blush from her. "If...if that's what you want..."

Just seeing her make that adorable face while rubbing his pleasure rod with her soft hooves earlier was almost too much for his heart, hammering away oh so fast in his chest. He truly believed he would experience a heart attacking from its rapid beating, as his love for Crystal was simply that strong.

"So," she said with uncertainty, holding his length firmly in between her hooves, "where do you want me to lick?" Unlike her slit, a male’s penis had so much space to lick that she couldn’t decide where to start. She also didn’t know what area a stallion would wish for a mare to lick the most, but she figured there would be a comparably highly sensitive place like her clitoris somewhere on it...

"A-Around the head and the middle ring," he answered in a low groan, still looking upwards, "those areas are r-really sensitive for stallions..." Once her wet tongue began licking at his cock's head while her hooves gently rubbed the fleshy ring around the middle, Sombra closed his eyes as he shuddered. "Ahh.... You're doing so well already..."

Moments later, after feeling him give a particular shudder over the touch of her tongue, Crystal soon pulled back, staring inquisitively at his member. "Did you cum?" she asked, believing he did, as she could see clear fluid trickle from the hole on its head.

Confused as to why she asked if he cummed when he clearly didn't, Sombra looked back to her, immediately realizing what she meant by that.

"Ah, no, princess; that’s just what's commonly known as 'pre-cum'. Simply put, it’s like a lubrication fluid, just like what you produce from your pussy. It helps make sex between male and female ponies easier and more enjoyable, and it also clears the tube in my penis of any urine, preparing the perfect conditions for my actual cum to move along through it unharmed."

Actually, now that he looked at his own pulsing tool, he could understand how she'd mistake it for cum, since it was something she never experience before. Blushing, Sombra meekly smiled at her; he had never produced so much precum before, and it was all for his lover, all for her to lap at and taste to her heart's content.

"Oh," she said before setting to work on cleaning his rod with her tongue, coating it in her saliva with every brush of her wet muscle, as she was still very much eager to please him. "Well, are you going to cum soon, Sombra?"

After taking a breath, Sombra spoke. "It'll...it'll come slower than you think, Crystal. And, I’m sorry to say, but what you're doing right now, it's simply not enough. It'll take more than licking for this stallion to reach his orgasm." That was simply fact, as he had so much experience doing this kind of thing that he'd built himself quite a substantial amount of endurance.

"Well...wha-what should I do?" she asked with enthusiasm, awaiting more instructions or pointers from him.

"You can suck it, my love. Gently put my cock into your mouth, lick the head with your tongue while it's in there, then start bobbing your head forwards and back, moving it in and out of your mouth."

"Ah!" she soon exclaimed in frustration after failing to get his cock's head in her mouth on her first try; her mouth just wasn’t used to inserting anything bigger into it than her morning bread. "This is so hard... Your c-cock is just really big...an...and long."

Blushing as he rubbed at the back of his head, Somra smiled bashfully at the unintended complement. "Well...it might be hard for a mare during their first time, but if they get enough practice, they can even eventually take in a stallion's cock all the way to the throat from head to the base. They call that act 'Deep-throating', and stallions love it a lot."

Telling his love about it, Sombra began to daydream about it himself. It had been so long since his rod had received that treatment from a Crystal mare, as ever since he started secretly dating the princess, he had cut off other mares and only saw her exclusively.

"Eh, I think it may be too advanced for you, my sweet, since it is your first time after all... Maybe you shouldn’t--ahh!" Suddenly, the surprising sensation of a ring of flesh wrap around his sensitive member snapped him out of his daydream, his cock's head moving deeper inside until it made contact with something moist and warm. After recollecting what he could of himself, Sombra looked down and was shocked to see his lover with his stallionhood in her mouth, attempting to do what he had just said.

She was trying so hard to take more of his big cock into her small mouth, but just like Sombra said, it was her first time and she knew nothing about the techniques required. Being as inexperienced as she was, and not knowing any tricks other mares would use, it didn't take long before her gag reflex kicked in, right as she was starting to run out of breath since his cock was also obstructing her windpipe. At last, she had no choice but to pull her head back, allowing his shaft to slide out of her mouth, coughing as she struggled to regain her breath.

"Crystal," Sombra said, a bit worried for her. What she was doing did feel pretty enjoyable and he'd love to continue, he also admired how willing and eager she was to put what she was learning to use, but he just couldn't bear to see her forcing herself through such an ordeal. "You shouldn't do that...you’re not ready yet..."

"No, Sombra, I want to do it," she said as she looked up to him, revealing a small tear sitting beside her eye, her beautiful eyes still burning with boundless determination; not a single shred of confidence lost, as she was still set on making it to her unyielding goal. "Please...tell me how to do it... Teach me so I can understand how to do it right...just for you."

"But--"

"Please! I-I know you want it too!" she interrupted before casting him adorable puppy eyes, her glistening eyes adding to the effect, making it near impossible for Sombra to resist...

"O-Ok... But don't force yourself too much, alright?" He waited for her to acknowledge him with a nod before he continued speaking. "So...to make it somewhat easier on yourself, please lay on your belly and ensure your throat is parallel to the floor."

Following his instructions, Crystal repositioned herself, laying flat with her chest touching the floor, his throbbing mast set directly before her eyes. Opening her mouth over his tip, she began to move forward, taking his cock in once more.

"Yesss, Crystal~" Sombra shakily commended her through the heavenly bliss gradually enveloping his rod. "You're doing well...don't, don't forget to breathe through your nose now."

Being a fast learner, Crystal used everything he taught her, managing to avoid a gag reflex or breathing troubles as she took in his fleshy ring and his tip made it into her throat; it almost seemed as if she had suddenly become an expert. Letting her instincts guide her and take control, she began bobbing her head forward and back on her lover's cock, her tongue wrapping around what it could as she slowly suckled at it, hearing Sombra lustfully moan in tune with her movements. She was so pleased to hear him react so contently from her actions, as it meant that she was finally doing everything right.

She really had improved in such a short amount of time, and before Sombra realized, he could already feel himself reaching his impending orgasm much sooner than he anticipated, surprising him.

"Oh...Crystal...I...I’m gonna c-cum soon! M-Maybe you should pull it out..."

Then again, he never imagined that her mouth and throat would feel this nice... As large volumes of cum began to pool around the base, he mentally built a dam within his cock, hoping to hold it all back for as long as he could.

Hearing his strained grunts, and feeling his legs slightly fidget around her, Crystal continued her actions, some unknown instinct within her coaxing her into not letting up until he came. Somewhere in the back of her mind, she wanted so desperately to taste his cum, to let it flood down her throat and fill her stomach with everything he could give.

The overwhelming pleasure of her throat's massaging muscles was too strong to resist, his mental dam crumbling at the seems as his endurance began to give out on him.

"I...I can’t hold it back anymore!" he warned, panting as he shook his head. "I'm...I'm gonna cum inside your throat! C-Crystal!" At that moment, his mind as well as the muscles in his groin relaxed against his wishes, his right hind leg inadvertently lifting a few inches off the ground when the dam finally burst forth into his lover. Rope after rope of his thick seed blasted out from his stallionhood, painting the insides of her throat white as it traveled down and collected in her stomach, filling her.

Crystal Heart shut her eyes tightly as she instinctively swallowed around her lover's intensely throbbing shaft, noting just how thick and warm each jut of his cum felt flowing down her over overworked throat. Wanting to milk him for every last drop, her tongue pressed and stroked against the underside and medial ring of his almost pounding erection, stimulating it into giving her more. It was at that moment that, unbeknownst to them, her crystal body began to glow a bit, becoming more and more transparent until it was possible for any potential onlookers to spot his large, black endowment lodged deep inside her maw, throbbing in absolute ecstasy as it continued to uncontrollably gushing vast amounts of virile white seed into Crystal for her to happily swallow.

Finally, after his member gave one last dying spurt, it was over.

The tip of his deflating rod tickling the walls of her throat on its way out, Crystal swallowed any remnants of his seed remaining in her mouth before clambering onto Sombra's side, holding him close.

"Ooh," she painfully groaned, lovingly nuzzling into his soft chest. "My...my tummy...it feels so full..."

Returning her embrace, Sombra tenderly smiled at her. "I'm so sorry, my dear Crystal... I forgot to mention that stallions cum differently from mares. And it seems that I was backed up from not having a release in a long time..." he explained in a worried tone, he looked upon his lover who still had her eyes closed, her stomach seemingly aching from taking so much of his thick essence in such a short amount of time.

Reopening her eyes, she looked back at him. "D-Don't be sorry, Sombra. If it makes you feel nice, then I'm happy to have done it for you." She knew that he enjoyed it immensely when he was cumming intensely while his cock was deep in her throat, and his moans of pleasure as he came still echoed throughout her mind.

"Thank you, my sweet Crystal," he said while caressing his face over her mane with tender loving care.

After what seemed like a minute of them sinply enjoying the other's company, Crystal, now recovered, perked her head up as she smiled at him, ready for the next step.

"So...can we begin mating now?" she asked excitedly.

As much as Sombra wanted to indulge her, he first had to explain another fact regarding stallions and sex. "Well...stallions need time to recharge after an orgasm, especially after how hard you made me burst, so please be patient, my sweet. It'll be soon."

"Oh, I see," she said while nodding in understanding. Seconds later, something occurred to her. "Hey, Sombra?"

"Hmm?"

"Why do you seem to have so much experience and knowledge about this sort of thing?"

"Oh, well...that's because this isn't the first time I've had sex," he answered honestly; he could never lie to her, yet his face visibly expressed concern over what she would think after hearing that. "Eh, you see, before we started dating each other, I used to have sex with other Crystal mares...some I met at the bar and others were maids in our castle..."

Crystal Heart was silent for a while...she felt something go wrong inside her heart upon hearing his answer, but she didn’t understand what it was or why.

"Does it...does it bother you?" he asked in both fear and apprehension after a while, breaking the silence that had grown between them.

"I don't know," she said with a small shake of her head. "I guess I feel kind of sad knowing that I'm not your first...but I guess I don't mind it. If sex does make a pony feel this good, then I understand why you and those other mares engaged in it from time to time. At least it gave you a lot of experience to teach me with." Seeing his expression change from worry to relief caused Crystal to giggle. She didn’t know what he was worrying about. Did he expect her to be angry with him for having sex with other mares?

"Yeah...yeah I guess it did." Suddenly bearing a large smile, Sombra hugged her even closer in happiness. "Oh but make no mistake, my Crystal, I'm glad to be your first!" His innocent princess appeared to be unable to feel jealousy in her heart after all, and he believed the inside of her crystal heart to be filled with pure love.

Closing her eyes, she relaxed into his embrace, gently rubbing his softened cock with her hoof as she whispered, "Only for you, Sombra." Her loins started burning in anticipation, just waiting for him to become hard once again so she could finally play with it once more... These moments spent embracing each other would be treasured by both lovers forevermore, but for Crystal, the seemingly insatiable burning between her hind legs reminded her of what she wanted most.

Finally, after what seemed like an eternity of waiting, the love muscle she was stroking softly with her hoof twitched...once again hardening with renewed vigor to the absolute joy of his lover’s squeals of excitement.

"Can we begin mating now, Sombra?" she asked innocently and eagerly once she felt that his rod was almost completely rigid once again in her soft hooves.

Chuckling, Sombra figured that he'd be more inclined to grant her request if she were to say it differently, more...erotic.

"No, my sweet, not just yet...I believe it would be better if you were to say," barely managing to hold back his laughter, he finished with, "'Can we fuck now?'" Oh, if only his princess knew about the kinky nature of that word and how naughty it sounded... It was just then that he began to wonder just how much he has corrupted this pure princess by teaching her all of these dirty words.

"Oh, ok then," she answered excitedly before looking up at him, maintaining her pure and adorably innocent face as she then said, "Sombra...can we fuck now?"

Because those words coming out of that face usually didn't mix, Sombra burst out laughing, momentarily confusing Crystal. However, regardless of her innocent demeanor, her words brought out the desired effect from him, as his mast painfully throbbed to full hardness, visibly pulsating veins and all.

Relaxing after his laughing fit ended, Sombra took a breath and accepted his lover’s request.

"Alright, my sweet, alright..." Repositioning himself to sit atop his haunches, bringing his length to point straight up proudly towards the sky, Sombra patted at his lap, beckoning her over with, "Come here, sit on my lap if you will."

"Huh? W-Wait, Sombra! Doesn't the female have to stand on all four legs first? So that male can mount her back and put his penis into her vagina?" she asked in confusion, already turned around and waiting in that exact position the moment her lover had said 'Alright'.

"Well, yeah," he said as he licked at his hoof, rubbing the saliva over his cock to once again lube it, what with Crystal's love nectar having run dry on him during the wait. "That's actually correct, my sweet, but intelligent, sapient creatures such as us ponies are capable of having sex in lots of different positions than just the ones our instinct tells us to use, you know?"

Crystal's face lit up in surprise. "W-Wow, really? I still have so much to learn... But...at least I know I can trust in you for now..." Following his lead, she backed up towards him and slowly sat down, moving her flank over Sombra’s lap. She then tried to sit down fully on him like he instructed, but it was impossible, she just couldn’t get past his huge rod.

"Ah, sorry about that dear," he said, noticing her distress. "Here, just line your pussy to the tip of my cock." Using both of his forelegs, he guided her hips, steering her body in the right direction. At the same time, with a little help from his magic, he guided his own cock towards her marehood until they perfectly aligned.

It was only then, when she felt his spire press against her nether lips that she looked down and noticed how large he truly was when combated to her small entrance, realizing that what she wanted might actually hurt a lot.

"S-Sombra," she whimpered as she looked over her shoulder to him, fear and worry featured all over her face. "I’m scared... Is this going to hurt much?"

His hooves maintaining her position over him, Sombra licked his lips nervously before giving his reply. "I'll be honest, my princess...the first time for a mares always hurts. Uh, b-but fear not! You must withstand the pain in order to feel the heavenly pleasure afterwards; it won't last long, I promise, and once the pain goes away, you'll start to feel very, very good," he ensured her in his calmest voice, trying to give her the trust and confidence she needed in order to withstand the ordeal. "Do you think you can tolerate it? Can you endure for me, Crystal?"

"I..." Crystal hesitated for a moment, almost calling for Sombra to stop. However, before she did so, his kind, empowering words of encouragement reverberated within her, giving her the strength to continue. "Y-Yes...I will, Sombra. Mmm--ahh," she soon moaned from the small rush of pleasure as she slowly lowered herself atop his tip.

"Easy there...this isn't something you should hurry," he advised, supporting her movements with his hooves and using his magic to gingerly spread her sensitive pink lips apart for his arrival. Feeling himself press against her burning entrance, Sombra released a cleansing sigh to maintain his focus. "Alright, now just try to relax, and let it slide into you slowly..."

"M-Mhmm," Crystal sounded with a weak nod.

Hearing her answer, Sombra very slowly and very gently brought her lower, his thick mast's head pressing against her tight slit before its coat of saliva finally allowed it to slip in, Crystal yelping in surprise as her hind legs jolted from the sudden intrusion. Not even an inch in yet and already Sombra was being extremely careful with the speed of his entrance, hoping not to cause her too much pain or discomfort. Seconds later however, his progress was halted when his very tip came into contact with a thin, membrane-like barrier. Knowing what it was and what it would bring, Sombra steeled himself, his tongue sticking out the side of his mouth in concentration as he began lowering Crystal at an exceedingly slow pace, his head pushing against this barrier, slowly tearing it from its weakest points.

"Ah! S-Sombra! Ow!" Crystal Heart sharply wailed in pain, her hind legs wrapping around his out of reflex as blood trickled from their joining; the pain was persistent, excruciating even! "That...that hurts," she whimpered, trembling as a stray tear rolled down her cheek. "W-What just happened?"

"Oh Crystal, I’m so sorry," Sombra softly apologized into her ear, trying to hold her as still as possible. "But that was your hymen, dear. It'll all be ok very soon...the pain should dull, I promise." Despite saying that, his mind still swam with doubt; she had just lost her virginity, and this was his first time taking it. He knew she was in pain, and he wished it wasn't so, but it order for it to go away as soon as possible, he would have to keep going.

After granting her a brief reprieve, Sombra picked up where he left off, slowly and gently sliding the rest of himself into her, Crystal wailing in both pain and pleasure as her tightening inner muscles hindered his advance. However, once he finally reached his goal and fully hilted within her, he held his position and allowed her time to adjust.

"Mmph," he grunted, holding her from behind, his forelegs over her belly maintaining her steadiness as he felt his tip kiss her second barrier, her cervix. "A-Alright...I'm completely inside you now, my sweet Crystal. Just...just simply move your hips up and down once you’re ready."

Her stretched walls still throbbing in pain around his length, Crystal moved her left front hoof behind her lover's neck in a hug. "Does...does it feel good for you, S-Sombra?" she asked.

Snuggling her crystal mane upon her head in happiness, Sombra licked at her cheek, hoping that her pain would disappear soon. "Yes...it feels really good for me, my sweet... You're so tight and warm. Much better than anypony I have ever done this with..." He released a content sigh. "I wish I could stay like this within you forever..." He did, he really did, but he still desired to move on to the next stage, his rod rubbing and and out against her insides, to have passionate and loving sex with her.

Several heartfelt moments later, Crystal spoke.

"Ok....I-I think I'm ready now... Um...but my hips, they're still numb from the pain... Could you please move them for me, Sombra?" She was being honest when she said this. The pain seemed to have disappeared from her system for now, but her hips felt completely numb and unresponsive to her, disobeying her will. Her body had never felt such great pain like that before in her entire life, so perhaps that part of her went in shock because of it.

"As you command, my princess~" Sombra whispered into her ear, kissing her cheek one more time before using both of his strong forelegs to move his lover’s hips, gently pulling and pushing his cock in and out of her pleasure-inducing slit.

The effects on her were immediate, Crystal moaning from every gentle caress Sombra's tool made against her sensitive internal vaginal walls, pangs and extra spikes of pleasure surging up her spine and into her brain each time his medial ring rubbed her engorged clitoris.

"A-Ah," she muttered breathlessly. "Oh..oh Sombra~ I...it’s starting to feel good now.... So much better than your licking...."

"I'm g--lad that you are now liking it, C-Crystal," he grunted in between thrusts, increasing his speed a bit once he noticed her marehood quickly adapting to the constant penetration. Suddenly, and to Sombra's surprise, Crystal Heart screamed in pleasure.

"No! N-Now I love it!" she squealed with eyes closed in a high-pitched, delighted voice, the numbness in her hips having dissipated completely, sending immense quantities of pleasure shooting throughout her body. A prideful smile appeared on Sombra's face, as he was glad to see that she was finally enjoying herself. However, once he looked down to where they were connected, he was stunned by what he discovered.

"Huh...what's this? Wow....this never happened before when I had sex with other Crystal Mares."

"W-What?" Crystal Heart questioned, opening her eyes at him in confusion, unsure of what he was talking about.

"Your body, Princess," Sombra explained. "It's so crystal-like now that it's become transparent! I...I can see myself inside you..."

Baffled by his explanation, Crystal's eyesight followed to where his eyes were looking at, and what she saw shocked her. True to his word, the area around her belly had become transparent, enough for her to clearly see her lovers’ large black mast deep inside her.

"Oh, wow," she uttered in amazement, nuzzling Sombra's head as she moaned in happiness and joy. "That...that looks so beautiful--ah....S-Sombra... D-Do you see it? You're inside of me--w-we've become one..." She then made to ask a question, but was interrupted by the pleasure coursing around his rod.

"Hmm? Do you need anything, my Crystal?" he asked as he ceased his thrusting, allowing her to catch her breath and focus on talking with him clearly.

Placing her hoof over his that was planted on her belly, she turned her head far enough to make eye contact with him. "You...you said that us ponies have lots of positions for sex, right?"

"Eh, yes, of course," he answered with a nod, curious as to what she was up to this time. "Why do you ask, my dear?"

"Show them to me," she replied without skipping a beat. "I want to know more...I want to," she began grinding her hips left and right atop his stallionhood, " to mat--I mean, f-fuck you in so many...many different ways~"

With an offer, and incentive, like that, how could he refuse?

"Well...heh, alright then... Now, I’m just going to shuffle a bit so I can lie down on my back." Removing his forelegs from around her barrel, he proceeded to do so, moaning with relief since sitting on his flank while holding her on his lap was starting to give him backache.

His rod impaling her from their new position, and her body still facing away from him, Crystal set her sights back to her lover. "Um, do I have to get off your cock first?"

Sombra shook his head. "No, you won’t have to, my sweet. Now that I've repositioned myself, it's your turn now to do the same. Firstly, please turn yourself to face me, and no...you won’t have to pull my cock out of your pussy for this; I simply ask that you use it as your support for when you move yourself." Honestly, he didn't want his stiff erection to cease being embraced by her warm vagina, and he would have protested if she tried to remove herself from it.

"Thank you, my love..." His shaft wedged deep within her, Crystal rotated atop him, shivering from the sparks of pleasure brought about by her slow yet satisfying act that only made her lust for him more. "Mmm, yes... Oh Sombra...it feels so good," she gratifyingly moaned, sitting atop his thighs as her body now faced his.

"Ok," Sombra said as he steadyed her hips with his forehooves, "now...ride me Crystal, use your hips to slide up and down my cock, exactly like I did when I moved them for you."

Not long after he said that, she began gyrating her hips atop his groin, his flared tip and medial ring stimulating her inner muscles the most.

"Oh...Sombra," she breathed huskily. "It feels...mmm, really nice, but...but a different sort of nice... I never knew that just, ah, c-changing the angle could make a difference in pleasure like this. W-What do my ponies call this position?" she asked, nearly losing herself as she started to vigorously plunge her lover’s cock back inside her marehood again and again.

Eyes shut from total bliss, Sombra ungrit his teeth to answer her. "It's...it's called Reverse Cowgirl, m-my princess." Shaking his head, he then said, "And no..please don't ask...even I don't know why they call it that, t-they just do..."

"That’s strange...a really strange name..." Her mind fogging, she began to rely more on her instants than her thoughts as her hips moved faster and faster atop him, her legs quivering in anticipating for pure ecstasy she knew was coming. "Oh...S-Sombra... Sombra...I-I think I’m... going to...cum again!" The moment she announced that, she completely submitted to her own body's urges, it moving on its own while all she could do was moan loudly from the rising pleasure that threatened to blow her mind the moment she reached her peak again.

"Y-You're so close, C-Crystal," he groaned, reopening his eyes and smiling at the sight of her closing her own in preparedness for what was coming. He only wished that he could stare into her beautiful eyes when they both reached their climax... "Please...let yourself cum and surrender to true heavenly bliss, m-my princess."

"Yes! Yes!" she shouted, loosing all restraint and bouncing atop him with reckless abandon, her body slamming down on him in full force. "I’m--I'm about to cum, Sombra! I’m cumming--I'm cumming just for you! Ahh~!" After giving on last bounce, she held atop him, her spasming walls gripping his mast tightly as his tip kissed her cervix when her world turned entirely white. All of her senses were overwhelmed with pure euphoria, her own juice leaking uncontrollably from her marehood, her love tunnel frantically squeezing and contracting around Sombra's pulsing stallionhood, trying so desperately to milk him all for all he was worth. However, he never came...as nothing emanated from his shaft, not a single drop...

"Huh? S-Sombra?" she soon asked after regaining her composure, looking at him and wondering in confusion as to why her insides felt devoid of his warm seed. "You didn't cum yet?"

"No...I haven’t, my princess," he answered simply as he looked back at her, helping her remove herself from him to sit alongside him.

"Why didn't you orgasm?" she questioned with a shivering voice. "Is...is my pussy not g...g...good enough for you?" Just the mere thought of that was enough to bring her to tears, as she began thinking of herself as incapable of bringing her lover to orgasm.

"No, my princess, it's not that," he said, wiping a tear from her face with his hoof before giving her a reassuring smile, letting her know that his next words were truthful. "Your pussy feels really, really good, but you've already had me orgasm recently before. Stallions have more endurance the second time around, and therefore a second orgasm would take longer for me to achieve."

"B-But I really wanted to feel your warm cum inside me!" she confessed, her hoof above her heart as she shouted her true desire.

"Well," Sombra drawled, smiling bashfully as rubbed at the back of his neck. "I can still do that...just for you, my sweet Crystal. I guess the real question is: Are you ready for more?"

"Yes!" she answered without having to think twice. Immediately after saying that, she looked down at her own body in wonder, observing her clit as it winked at her, almost as if it were saying that it needed no rest yet and could still play some more. "Hmm...wow...it seems like I don't need a long time recharging after an orgasm like you. I can go for a third time right now!"

"That’s perfectly normal for mares, my sweet. Since their orgasms and climaxes are different from stallions, mares can have multiple orgasms in a short amount of time without resting." Explaining that to her, Sombra realized that, in some way, he felt just like a sex-ed teacher, instructing one of his most innocent and beloved students everything they'd need to know about sex. "Understand that stallions like me need time to recharge and prepare more of our thick semen for ejaculation; therefore it'll take a bit longer than it does for mares."

"Oh," she said, pulling her head back in a amazement, "seems like mares kind of cheat in that aspect... Orgasms feel really good, so it doesn’t seem fair that a stallion like you can't experience as many as I can..." She dryly chuckled a bit before her expression saddened, which in turn, made Sombra laugh from seeing her get sad from something like that.

"Heh, so," he started, shaking his head mirthfully with a cheerful shrug of his shoulders, "how should we do it this time, my sweet?" Being fully aware that she didn't know much about sexual positions, he was about to make a suggestion. However, before he could do so, he was interrupted and surprised when she beat him to the punch with her own answer, excitement and definitely impatience evident in her voice.

"Can we do it while I stand on four legs?! Just like in the book I saw?! Oh please!" Not even giving him a chance to respond, she stood up and turned herself away, presenting her soaked marehood to him. Her clit was winking fervently, trying so hard to have him throw all caution to the wind and push his firm rod back into her. "Can you mount me, Sombra, please!?" she begged, looking at him from over her shoulder.

Staring at her nethers, Sombra was left speechless for a moment.

"Are...are you sure you can take my weight, Crystal?" he asked with worry; she was smaller than him after all. Despite all the excuses his mind made not to, he secretly wished so hard for her to say yes, to let him pound her frantically. He drooled at the scene in front of him, his member throbbing painfully while leaking lots of precum. The scandalous position she was in had awakened a hidden, primal instinct and deep desire within him, the almost unbearable urge to mate with her.

"Of course I can take you!" Crystal shouted proudly with confidence. "Remember, I was the one who carried you from outside our kingdom to my room ten years ago!" Brushing her tail slyly under his chin, she then said sultrily, "So come and get me, Sombra~" Giving in to her temptations, Sombra raised onto his hooves, approached her, and did so, Crystal releasing a subtle 'Oof' once he mounted her. Satisfied by the feeling of his hooves wrapping around her barrel, Crystal was then irritated when he took his sweet time checking and testing his balance atop her, his cock unintentionally poking and prodding at her entrance all the while. "Oh come on, Sombra!" she complained. "Don't tease me, just please put it inside me already!"

"Eh, sorry, my love," he apologized. "I just wanted to be sure that I'd be gentle on you." Fortunately for her, everything seemed right to him, and it wasn’t long before his hardened rock slowly plunged back into the warm confines of her tight love tunnel, pleasing her to no end.

"Ah!" she gasped, her vaginal walls already squeezing around the head of his penetrating member. "Yes! Sombra...p-push it deep inside me! Oh that feels so good!" Gradually stretching her insides even further, and making her hind legs twitch when his medial ring slipped in, his stallionhood's advance soon came to an abrupt stop. "Oup!" she sounded in shock, wondering what it was that he had bumped into inside her. "W-What was that!?"

Feeling his own shaft's throbbing, as well as her tunnel's, Sombra had a pretty good idea as to what it was. "It seems that I've just hit your cervix, dear. That’s as," he licked his drying lips, "that's as deep as I’m ever going to get."

This new barrier might have been unexpected, but at least it wasn’t really painful, and to that, Crystal was thankful. "I-It's okay! Just please keep moving!"

"As you wish, my Crystal" Sombra responded, more than happy to grant her that request.

Being cautious at first, he pulled himself back, Crystal cooing from the sensation of his tip scraping against her inner ridges as he cocked his hips, readying her for the force that he was about to give her. Not wanting to catch her off guard and have her fall down completely on her belly, his reentry started off slow, his medial ring slipping in, followed by his tip kissing her cervix before he reversed the motion and started again, gradually increasing the speed and strength of his thrusts each time. Soon enough, they reached a substantial point for the both of them, finding a pace where they could both experience sweet pleasure without putting too much of a burden on Crystal's legs.

"Mmm...this is...this so much better than I would have ever dreamed of!" Crystal cried, her moans directed towards the ground. Shortly after Sombra had decided to increase the force of his thrusts, her front legs gave way, her upper half now lying down on the ground as only her rear legs remained standing, supporting her hips while she continued to take in his pistoning length. She instantly found her new position more suitable for her, her entire body recoiling from the stallion’s hard thrusts as his wonderful cock continued to slide in and out of her entrance, bringing a constant barrage of pleasure for both.

"You’ve really dreamed about me fucking you in the past?" Sombra curiously asked, hammering away at her tight marehood.

Her body shivering, and her mind wracked by the pleasure signals hitting her brain as he continuously pounded into her, Crystal Heart's speech was nearly incoherent. "Y-Yes...YES! Ever since I’ve--mph--learned about m-mating--ah-f-from that book, I’ve always fantasized about...about it! Y-You...mating with me in this position..grrr...THIS is A d-REAM come t-TRUE!!"

Unlike Crystal Heart, Sombra had more experience with sex, so it was little effort for him to speak in a clear voice while fucking. "You’ve always dreamt about me? ...Only me? Was there really no other stallion that ever popped into your mind? Like your own guards, or even your teacher?"

"W-Why?" she managed to ask around her lolling tongue. "Don’t ponies only mate with the pony they l--" right as she was about to finish that sentence, Sombra pulled his rod out, only to unceremoniously shove it back in, causing a sudden increase in her vocals due to the sudden pleasure coursing through her "--LOVE!"

"Well...yes and no... Sometimes ponies mate with friends too, mainly for the pleasure of both parties. You can feel this now, right? How doing this feels so good?" Sombra spoke from experience, for in the past he used to have friends with benefits, spending nights with maids or some mare friends just for the pleasurable experience... However, once he finally realized that Crystal Heart would be his lifetime lover, he ceased all contact with them, vowing to himself that he would never return to that lifestyle ever again.

"Oh," she moaned, "mating is more complex than I th-thought. Ahhh....if sex is something we can do with friends, then--ohhh--m-maybe I can try it with C-Citrine!" She thought this was plausible, since Citrine, despite being one of her maids, was the only female friend Crystal had that was courageous enough to talk to and treat her as if she were an ordinary Crystal mare; sometimes, she'd even help Crystal sneak out of her room.

Being a friend of Citrine's as well, Sombra blushed at the thought of her and Crystal writhing atop one another, their furs drenched in sweat as they moaned into the other's mouth. "I uh...I wouldn't mind if you were to do that with her," he said, trying to suppress the giddiness in his voice. "Though, out of her respect for you, I don’t know if she'll accept... But heh, at least you won’t have to worry if she swings that way."

"S-Swing that way?" Crystal asked. "What does that mean?"

Watching her flanks ripple from the impact of his thrusts, Sombra explained. "It’s a saying that ponies use to...to represent what gender a pony prefers to have sex with. So when I said she 'swings that way', it means that she's only interested in having sex with mares like you and not with s-stallions like myself." He had find that the hard way when she turned down his advances, and it was quite an amazing coincidence to him when he learned that both he and Citrine happened to have eyes on the very same pony, the beautiful princess
Crystal Heart, his one true love and the sexy mare that he was having heavenly sex with right now.

"Aww...t-that’s too b-bad," she muttered with disappointment. "I just thought that s-sometime soon, the three of us could get together to have s-sex together!"

Huh, wow...first time having sex and already she was planning a threesome, Sombra thought, soon noticing his second orgasm approach with every thrust he gave into her. "Mmm...hey, C-Crystal...I think...I think I'm going to cum soon...what about you?"

"Yesss!" she shouted excitedly, his declaration triggering her inner muscles to clam onto his rod from all directions, coxing it into releasing its load into her deepest recesses. "Please! C-Cum inside me Sombra!"

"But...but what about your orgasm? I can...hold back a bit and...wait for you to cum with me at the same time?" Saying that, he slowed down the speed of his thrusts, delaying his orgasm that was so close to passing the point of no return.

"N-No need for that Sombra!" she yelled back at him, shaking her rump with his mast still inside her, a sign that she was just begging him to fuck her at full speed again. "I'm going to cum soon too!"

"Very well then my love, prepare yourself." Pulling back until just the tip of his length remained in her, Sombra then said, "I'm about to fuck you harder and faster than we've achieved so far, will you be ok with it?" Seeing her excited, yearning nod was all the permission he needed to plunged his entire mast back into her tunnel before retreating and repeating, the speed and force of each set increasing with his thrusts.

Crystal heart moaned loudly in pure bliss, trying to hold on to the ground for dear life; there was no way that she was going to let this incredible pleasure suddenly end just because she lost her footing.

"Oh, yes! she screamed, her tongue hanging loose as the wall of extreme pleasure racked through her entire form with what felt like the force of a typhoon. "Sombraaaa! P-Please! You're so good! S-Sombra...please cum...cum with M-ME! O-Oh, I'm...I'm c-cumming! Ahhh!" Just then, her vagina seized Sombra's stallionhood in a vice-like grip, discharging large amounts of her own mare cum around it. From how her walls were squeezing him, Sombra swore she was going to milk him for every last drop of virile stallion cum he had.

Staving off his end point until the last second, Sombra managed to yank most of his cock free from her inside's heavenly grip until only the tip remained within her tight lower lips. Mere seconds later, he, without giving her much warning, slammed back in at full force, not stopping until his flared head collided against her womb’s entrance where he finally let loose, his mind blanking on him from the following mind-numbing bliss as huge volumes of his warm and thick white seed erupted from his shaft, all of it collecting inside his one true lover.

It was at this point that Crystal Heart’s body became crystal clear again, enabling him to see his tool in action as each spurt of his potent white seed filled her entire womb to capacity. With no further room within her, an excess amount of both his and her cum leaked out from around their joining, dripping profusely onto the crystalline floor and forming a small pool beneath them.

Finally, after his length shoot one last volley, it was over.

"Oh...So-Sombra," she happily muttered in a husky, tired voice, her hind legs finally giving out before collapsing onto the floor in exhaustion, Sombra gently laying down with her while his member slowly dislodged itself from her as it softened. "That felt...really good...you being inside of me...so warm and...so full." She licked her lips and swallowed air before finishing with, "Finally having sex with you...it really was worth the wait for my estrus to arrive..."

Riding out his after glow with half lidded eyes, Sombra pecked lovingly at her neck as he spoke. "Yeah...it felt really nice for me too..." Pausing in mid-kiss, it took his brain a few seconds to fully process what she just said, his eyes widening in shock once it did. "Wait! YOU WHAT!? Princess...did...did you just say that you're in heat!?"

Panicking, he backed away from her before rising onto all fours, his now flaccid penis slipping free from his princess, allowing loads of his cum to trickle out from her a sore marehood. He worried; on any other day, it would have been an erotic sight to see, but not this time...with the amount he had pumped into her, there was no doubt that she was now pregnant for sure...

"Yes! I'm in heat, Sombra!" she answered happily, a large carefree smile on her face.

"W-Why didn’t you tell me?" he asked with concern laced in his face, sitting on his haunches before her. His dangling length rested on his thigh as it slowly but surely retreated back into its sheath.

Seeing that he was upset for some reason, Crystal began to realize that perhaps she misunderstood something from the animal biology book again. "Huh?" she uttered, her head tilted in confusion at him as she sat up and faced him as well. "B-But I thought you already knew that I was... Don't ponies only have sex when they're in heat?"

Sombra shakily shook his head at her. "N-No... Look, Crystal...unlike animals that only have sex when they're in heat, us ponies can have it anytime we want-- there's no need to wait for the mare to reach estrus..."

Wondering why she didn't display any heat symptoms earlier, he quickly examined her, soon coming to the conclusion that, because of the lack of sexual education instilled by her father, she didn't know how to properly react once she became aware of her first heat. Sombra had heard of this somewhere before, something called a 'Silent Heat'. It was where a mare, despite being in her estrus cycle, would show no behavioral signs of it.

Confused, Crystal Heart scratched at the side of her head with a hoof. "But wait...then how would ponies have offspring if they want to mate outside of mating season? That doesn't make any sense. Isn't conceiving a foal the most important part of sex?"

Nervously rubbing at the back of his head, Sombra averted his eyes from her and blushed as he answered her innocent question. "Well...we ponies enjoy having sex outside of mating season because...because we just want to do it for the passion and pleasure. Eh, you know what I mean, Crystal? After all, didn’t you feel really good during it?"

"Yes, very much so," she replied with a curt nod before tilting her head in bewilderment, still lost on a few things. "So...we can really have sex just because it feels nice? Not for the sole purpose of having a foal?" Well, she supposes that would explain why Sombra would have sex with his female friends and that no foals had resulted from those encounters. She began to understand that, just maybe, sex can be done just for fun like Sombra had said.

"Yes, that's exactly it. They may want to indulge in this fun with their lover or a close friend, but that doesn't exactly mean that they want a foal just yet. Many stallions try to avoid trying having sex with mares in heat so that doesn't happen." As he explained this, Crystal Heart nodded in understanding.

Her eyes widening in worry seconds later, she looked down and softly rubbed at her belly with a hoof.

"So...I have a foal inside me now? Did...did I do something wrong, Sombra?"

Looking at her stroke her lower abdomen, Sombra lowered his sight and sighed. "Yes...and no... Normally, ponies only have foals when they think they're ready to take care of them...and usually not until after marriage..." Taking a deep breath, he raised his gaze and looked her in the eyes. "Please understand, Crystal, we're not ready for one right now... Our love exists in secret, even your own father doesn't know about it..."

Her father, what would he do if he were to find out?

Realizing the magnitude of trouble she had inadvertently put him in, Crystal Heart shook her head as her eyes flooded with tears, her voice barely heard over the sound of her own choked snivels. "I'm...I'm sorry.... I just...I...I didn’t know..."

Sombra wanted to cry as well, but he had to stay strong in front of his princess, his strength would be her strength. "Marriage between us is...is almost impossible... The king is gonna kill me once he knows about this." Even as he wasn't sure what the king would do with him and his foal, but what he said wasn't beyond the realm of possibility. Will he execute him and make his daughter raise their child alone? Or will he try to prevent the princess from giving birth by killing the foal while it's still inside Crystal Heart? Both thoughts were equally horrifying to him.

"Can't we...can't we keep it in secret?" she asked, trembling with hope. Maybe she could keep the pregnancy a secret too, just like her love with Sombra. Sadly, and to Crystal's sorrow, Sombra shook his head.

"No...I’m sorry, Crystal.... It'll be impossible to keep this a secret... Sooner or later, the signs of pregnancy will show, and even if you can get through that stage, you'll eventually give birth to our child and someone will have to know about it." Closing his eyes for a moment, he sighed. "But...that doesn’t matter anyway, since the king will surely find out well before that..." Never before in his life has Sombra ever feared something so badly like this before, but... "We...we must tell him...right now..."

He never believed in his wildest dreams that he would have to tell the king that he loved his daughter, especially after just taking her innocence and virginity, and to top it all off, impregnated her... There could never be a poorer time and with even worse conditions to reveal this secret to her father...

Trembling in fear, Crystal looked at her lover with watery eyes as she extended her hoof to him. "Sombra....I’m...I'm so afraid... Will my father take you away from me?"

Wrapping his hoof around hers, Sombra pulled her in, consoling her with a heartfelt hug as he tenderly caressed the side of her face. "It's okay, my sweet. Shh, shh, it's ok.... Everything'll be fine..." No matter what he said or did, she just wouldn't stop crying, which hurt him deeply to see her like this.

Finally, after her tears had long ran dry, they steeled themselves enough to face the consequences, the both of them walking down the 'longest staircase' on their way to the throne room, ready to face the king, Crystal Heart’s father. Whatever his judgment would be, for better or worse, at least they both would face this trial together...

THWACK!

The sound of the king's hoof harshly impacting against Sombra's cheek echoed throughout the throne room, causing even the stoic guards outside the doors to jolt in surprise.

"How dare you commit such a treasonous act!" the king roared in anger, towering above a prone Sombra from his throne. "I entrusted you to protect my pure-hearted daughter, not impregnate her! You've...corrupted her with your sickening sexual desires!"

"Father! Please don't hurt him!" Crystal Heart cried, hurrying to Sombra's side. Once she helped him off the floor, with fearful tears in her eyes, she looked up to her furious father. "It's not his fault, i-it's mine! I was the one who asked him to have sex with me! It was I who didn’t tell him that I was in heat!"

The king scowled. "You don't need to pretend it was your doing just to protect him, Crystal! He had to have made you do it! Did he force you to have sex with him!? You shouldn’t even know anything about that! You can't ask somepony to do something you don't know!" He was confused, why was his daughter so adamant with protecting him?

"But I did know father!" she shouted back with a hoof on her chest. "At first, I didn’t know anything about sex, but one day in biology class, I discovered that animals have something called mating and mating season, which involved an action between male and female animals. So I thought that, maybe, ponies might be able to experience the same thing... So...so I asked him to do it with me..."

That teacher! the king thought, grinding his teeth in a rage. I told him not to teach anything about sex-education to my daughter! But he had no problems with teaching her about animals mating!? He thought that it must have been the personal teacher he had assigned to her, but what he didn’t know was that what she referred to as 'biology class' was actually just a period of reading from a biology book that she had collected from outside her tower when she had snuck away once.

Hoping this would work and somewhat quell his anger, Crystal gave her father the same big adorable eyes that had won Sombra's heart long ago. "Father...please... May I marry him? We have actually been secret lovers for a while now...even going on secret dates together..."

"You want to WHAT!?" Unaffected by her pleading eyes, the king glared daggers towards Crystal Heart in a way a father wouldn't to their own child... "You can't marry this lowly unicorn! You're pure heart will become corrupted by him! No, as of this moment, you are hereby forb--" Just then, the priest interrupted, who had been standing beside the king the entire time. Whispering something into the king's ear, he pointed a hoof at Crystal Heart's flank. His eyes widening moments later, the king looked to Crystal with a stunned expression. "Crystal, my daughter... Is that...your cutie mark?"

"My cutie mark?" she questioned, pulling her head back in confusion. Quickly turning her head to look at her flank, she was surprised to discover that, what was blank only this morning beforehand, now had the imprint of a heart made of pure crystal embedded onto it. "Ah! Father! Look!" she happily shouted for all to hear, jumping around the throne room in utter joy. "My cutie mark! Oh I have my own cutie mark now! Yes!"

Rubbing a hoof at his chin, it appeared as if the king were pondering something. "Hmm...it seems that we have no choice now... Daughter....this must be destiny....so I approval your union together. Sombra," ignoring the pain, Sombra's posture straightened at the sound of his name being called, "you shall have my blessing to marry my daughter Crystal. The wedding between the both of you will happen soon and it will be a most joyous event." With that announced, the king sighed in relief. He feared everything going wrong the moment he found out that Crystal Heart was pregnant, but was quickly reassured once he had seen her cutie mark. "One question, my daughter. Can you tell me when you got that cutie mark? Was it when he confessed his love? When he kissed you, or was it when..."

Ceasing her jumping, she turned to her father, then, with a bright, loud and innocent voice, she said, "Oh, it must have been when he FUCKED me!"

If a pin was dropped, it would have been heard by everypony in the room and the next one over...

With both the king and priest turning towards Sombra, they saw him sweating profusely with a goofy grin on his face as he slowly backed out of the throne room.

Noticing that everypony had gone silent in the room for some reason, Crystal titled her head in confusion. "Did I say something wrong?"

With Sombra slipping backwards out the double doors to the throne room, the king then yelled, "SOOOMMMMBRAAA!"

And so, it was proclaimed that the marriage between the sole unicorn in the Crystal Empire and the king’s own daughter was to take place a week from that moment, as the Royal Cute-Mark Ceremony--a celebration that happens when one of royal family gains their cutie mark and realizing their talent-- had to come first. One week after that, the captain of the Crystal Guard and Princess Crystal Heart were happily wed in one of the biggest and most celebrated empire-wide events that the Crystal Empire was unlikely to surpass in magnitude for a very long time to come.

With the king still residing over the empire, the young prince and princess lived together in the Crystal Castle, and after eleven months had passed, Prince Sombra witnessed his love, Princess Crystal Heart, give birth to the future heir of the Crystal Empire; a beautiful pink-coated pegasus filly with a lovey tri-coloured mane consisting of vanilla, magenta and violet.

To calm the citizens of the empire of any scandalous rumors floating about, Prince Sombra publicly explained the reason as to why their heir was born as pegasus, despite none of her parents being one. He assured them that his own father was a pegasus while his mother a unicorn, thus providing the genes necessary for her pegasi birth... However, the origins of her unique coat and mane colors continued to remain a mystery...

Both the Prince and Princess lived on normally, taking good care of their child together with the help of their maid friend, Citrine, as they waited for the time to come...the time for when Crystal’s father would retire as king of the Crystal Empire and crown Prince Sombra and Princess Crystal Heart as the new rulers of the Crystal Empire, where they would bring about a new golden age by reigning together with love...

Somewhere, in a dark, hidden place deep within the castle, the king and his two priests were standing before a magic monitor. Displayed on it, the image of the Crystal Empire with its barrier deployed, the very same barrier that protects the city from the freezing tundra and many demons that surround it. Also displayed on it was the picture of a white unicorn with wings, and finally, that of a young Crystal Heart herself...

The entire display was, in fact, a diagram of a plan that was a long time in the making by the king and priests, something which involved a powerful magical artifact and the pure white princess...

"I never would have guessed that the black unicorn was a required stimulant for the princess to mature as we had planned, my king," one of the priest said as he turned to the king, who was deep in thought as he stared at the monitor. "She's followed our entire defined destiny routes up until now, and that cutie mark is the final piece of proof that we're almost there."

"Hmm, so keeping her pure and innocent wasn’t enough it seems," the king muttered. "In the end, in order for her to become the heart, she has to know what true love is after all... This really was...unexpected... But, at least everything is still going as planned... Soon, the Crystal Ponies of the empire shall suffer no longer once this project is successful..." Saying that, he breathed a sigh of relief, as he really did almost have a heart attack when he learned that Crystal Heart had gotten pregnant. Twelve years of hard work maintaining this project, keeping it all a secret, almost wasted. Fortunately however, everything came out fine in the end.

"Yes, my lord," the second priest said. "The time will come... When she reaches the age of twenty, her magically modified body will develop into something else, something that we know will become powerful and immortal... It will be her heart that will save us all, so until then, we suggest that you let the princess do anything she desires until that time comes...

"Why?" the king asked. This was the same priest who told him to keep Crystal Heart's heart pure and innocent in the first place. Now he suggests doing the opposite of what they’ve been doing for twelve years? Keeping her locked away in a tower like a fairy tale princess, ensuring she was shielded away from the outside world filled with many painful and horrible things.

"Simple, my king. The more she loves, the more powerful her heart will be when she finally becomes the heart of the empire..."

The priest may have failed to properly calculate all possible factors, but it was only now that he realized keeping the princess locked away with a pure heart wasn’t the key for this project to work... No, for how could anypony ever find their cutie mark if they were not free to discover it for themselves?

The King redirected his sights to the monitor. "Hmm, then I shall do as you suggest, priest. Crystal Heart shall have true freedom within the empire, now leave me."

"For the future of the Crystal Empire!" Both priests exclaim in unison, saluting the king before leaving him behind in the hidden room.

"For the future of the Crystal Empire..." Once he was alone, he raised his hoof and touched Crystal Heart’s picture on the monitor, whispering in a cold voice to himself, "You will protect our empire forever, my little orphan... The empire will be safe forever, and its golden age will never end... With your immortal heart, you shall protect us all..."

"Crystal Heart...."

Crystal Shadow

by Enigmatic Otaku

A lesson in biology and intimacy