From a Big Horse to a Tiny Mare
Anon whistled a tune to himself as he left the Ponyville Marketplace with several bags of groceries in his arms, stopping to wave at ponies here and there as he made his way to his shared house in Ponyville.
One day, the man had woken up in the outskirts of Ponyville after binge-watching a bunch of My Little Pony episodes. But upon meeting his first friend and current roommate, Lyra Heartstrings, the man’s jaw dropped upon seeing the ginormous difference from the Equestrian ponies on the TV screen vs. in real life. They were the size of horses, with the aquamarine mare reaching Anon’s shoulder, and weighing several times his size. Even with the man staring at Lyra as if she had two heads, Lyra was still grinning from ear to ear as she asked him many questions about who he was and where he came from, not even hesitating to invite him to stay at her house. Just a few days after moving in, Anon had taken on his own job that he worked on the weekdays so he could pitch in when it came to stuff that the two needed. It was a Saturday, and Anon stopped his whistling altogether as he approached the door and unlocked it with his key, opening the door and shutting it. As he closed the door behind him, Anon’s breath got caught in his throat, nearly dropping his groceries upon the sight before him.
Lyra had her body squatted on one of the ends of the couch, her pussy rubbing against it as mare juices soaked the furniture’s surface. She didn’t even look at Anon at first, her eyes rolled to the back of her head as a continuous groan escaped her mouth. Anon slowly strolled over to the kitchen table nearby and set the groceries down, the sound causing Lyra to snap out of her trance and stare right at her human roommate.
“Anon!” Lyra blushed as she shouted his name. “It’s m-my heat, it’s really bad this time and I d-don’t want to use spells this time…”
“What do you mean?” Anon turned to stare at Lyra, feeling his heart racing and blood rushing to his penis as he properly took in the sight of Lyra as she gasped with each movement she made against the couch that would most likely take hours to clean if the whole piece of furniture was even cleanable. But that was beside the point, Anon told himself as he tried to put two and two together.
“Are you…going to go out?” Anon asked. “Because y’know you need to be careful and not hook up with just any-”
“No, you dumbass!” Lyra snapped. “The only one I’d trust with this is you. My roommate, my best friend…please Anon. If you really don’t want to, I’ll just use one of my spells. But I hate suppressing myself time and time again. I just want this itch scratched properly for once.”
Anon shut his mouth, his eyes widening at Lyra’s request. He’d be lying if he said he didn’t entertain the idea of having sex with the large ponies, but given the jarring realization of just how big they were, he usually brushed off any serious thoughts about it. Especially since…
“Could I even satisfy your heat?” Anon asked. “It’s not like I’ve stared at stallion penises or anything, but I’m pretty sure their dicks are three times bigger than mine…”
“I don’t care!” Lyra gasped, thrusting harder against the couch. “I just need you to try!”
Anon took a deep breath, knowing that agreeing to this would not only punch his interspecies v-card, but forever change his relationship with his roommate. But he couldn’t bring himself to just turn down a mare giving him the biggest puppy dog eyes he had ever seen! Sighing, Anon unzipped his jeans, causing Lyra’s eyes to light up as she stared down at his clothed crouch like a foal in a candy store. The mare gave a soft gasp, her tongue lolling out of her mouth as she abandoned the couch and galloped to her human roommate.
“Thank you!” Lyra squealed, headbutting Anon’s chest hard enough to knock the man against the wall with little effort. “You have no idea how much this means to me! I’ll even buy us dinner afterwards, my treat!”
“You don’t…have to do that…” Anon gasped as Lyra moved down to grab the human’s jeans by the teeth and yank it down to reveal his boxers.
“You have another layer of clothing hiding your cock?” Lyra scoffed. “I swear, I don’t understand you humans. Not like it’s going to stop me or anything.”
Anon stayed quiet as Lyra did the same thing to his boxers, swiftly pulling it down with her teeth as she stared at his above average size dick like a moth to a flame. It was already fully erect from the mare’s show, and Lyra nodded as she moved back and turned around to present her giant dripping and glistening lime green pussy to Anon, wiggling her ass as she waited for the human to take her. Anon kicked his pants, boxers, and shoes aside before walking up to Lyra and resting his hands on each side of her flanks as he managed to line himself up with her pussy, slowly pushing in with the ease of throwing a hot dog down a hallway. After a moment of hilting himself balls deep within the giantess’ depths, Lyra glanced over her shoulder with a slight frown.
“Did you put all of it in?” Lyra asked, her eyes widening as she heard Anon wince. “Oh, it seems like you did then.”
“Is it too late to use one of your spells?” Anon chuckled, feeling heat rushing to his face at her previous comment.
“As a last resort, I can,” Lyra shrugged. “But maybe it’ll feel better when you start pounding me properly?”
“Y-Yeah, will do,” Anon pulled out all of his cock except the tip, and then proceeded to ram his cock back in without any gentleness, hoping to see Lyra gasp and cry out. Instead, the big mare barely moved from the thrust, managing a smile at Anon and a nod to continue. Anon felt his temper fire up as he began jackhammering into the mare as if his life depended on it, working up a sweat as he sank his fingernails deep into Lyra’s pillowy soft ass cheeks. Noticing Lyra starting to scowl, Anon closed his eyes, not bringing himself to the reality that he was failing to satisfy her, not when he was so close to reaching his own orgasm. If anything, he told himself, he could probably place his whole arm inside Lyra and have a much better chance of getting her off. Deciding on that, Anon hilted himself quite easily inside of his roommate and allowed shot after shot of his cum flow inside her, sighing with relief as Lyra made no move to stop him. His feelings came crashing down on him, and as he pulled his softening cock out of the mare, Anon walked around and pressed Lyra’s face against his chest as he hugged her.
“Fuck, I’m sorry Lyra,” Anon whispered, playing with Lyra’s mane as he petted her.
“What are you sorry for?” Lyra glanced up at him with wide golden eyes.
“This was your first time with me, in your heat no less, and I couldn’t make it better for you,” Anon groaned. “It felt selfish that I continued when I knew your heat wasn’t getting any better.”
“It’s okay, Anon!” Lyra smiled, despite the raging lust still burning inside her body. “If anything, it means a lot to me that you were willing to help me instead of some random stallion. And I-woah!”
Lyra gasped as she stepped out from Anon’s embrace, feeling her body suddenly lighter of at least several hundred pounds as her entire body from her once big head to her slender legs became a smaller version of their past size. It was almost like something out of a cartoon with the way her entire body looked the same, but far smaller. By the time the transformation was complete, she reached Anon’s waist and was more so the size of a big dog rather than a horse. Having lost so much of her weight and height, Lyra stared up at Anon’s towering stature with a heavy blush at the human’s wide eyes.
“Jesus Christ!” Anon gasped, slapping his forehead with his hand as he gawked at his smaller roommate. “How in the Equestria did you get small-mmph!”
Lyra used her magic to yank Anon down to her level, pressing her lips against his lips in a tight lip-lock as she slipped her tongue in, feeling her pussy clenching against nothing again as she found herself confused and euphoric all at once. Be damned why his orgasm caused such a drastic change in her, but she had a hunch what benefits her new size would give her. Pulling back from the kiss and smirking, Lyra glanced at Anon’s soft cock and gave him a half-lidded stare as he stood back up. Her current height was perfect, with his cock being exactly at her eye level, giving her an idea to salvage the afternoon. Using her magic to yank him forward by the shirt, Lyra began nuzzling Anon’s ballsack and enjoying the tangy human musk that came from it, different from the overpowering earthy musk of stallions that she expected, but far from something to complain about as the scent caused her eyes to roll to the back of her head. Anon stopped his panic and moaned as he felt his cock starting to get erect again. After peppering his growing length with kisses and swipes of her tongue, Lyra grinned as she ducked her face underneath his cock and licked his balls. The position also helped her get a good idea how big his cock was in comparison to her face now, with his cock resting on her muzzle. It was nearly long enough to reach past her flickering ears as she suckled on his balls for a few minutes before pulling back and admiring Anon’s fully erect cock.
“So~” Lyra smirked. “I’m guessing that my shrinkage had something to do with that cum you gave me…”
“Oh,” Anon’s eyes widened briefly before he nodded. “Y-Yeah, that would make sense.”
“Which does give you a proper second chance,” Lyra chuckled as she turned back around and used her magic to pry her ass cheeks apart and reveal her much smaller pussy. “So why don’t you breed me like a stallion properly this time~”
Anon didn’t hesitate, feeling his bruised ego from earlier healing up as he rushed over to Lyra and grabbed her flanks again. This time, instead of slamming himself in, he savored the moment as he used his hand to line up his cock up with her pussy and slowly penetrate her before placing his hand back on her flank. Lyra gasped as she felt her pussy tight around his cock this time, molded around his dick like they were puzzle pieces connecting together. Lyra felt fiery jolts throughout her body as it thanked her for the right equipment to sate her growing lust. Without being able to stop it, Lyra let out a loud feminine moan throughout the house as Anon had almost his entire length inside of her. He then looked at his hands on her cheeks, noticing that instead of them covering a quarter of her once big horse cheeks, they covered nearly her entire butt cheeks as he groped them roughly. Despite his tight grip on them, Lyra managed to move forward, removing half of his length from her wet and warm depths, before slamming herself back against him. Her butt cheeks collided with Anon’s balls as she stifled a moan and bit her lip. His cock, which had once felt like a finger inside of her giant horse pussy, filled her in all of the right spots, and she couldn’t imagine how much better it could get. Until Anon reached over and yanked Lyra’s mane back, using his other hand to slap her ass as a sharp squeak escaped her mouth.
“I thought I was breeding you like a stallion?” Anon pulled his cock back until the tip was the only part inside. “So no fucking yourself on it, I’m in charge here. Understood?”
“Y-Yes,” Lyra whimpered, looking back at Anon with a heavy blush as he chuckled at her change of tune. “Please…”
“Please what?” Anon tilted his head with a smile. “Do you need something from me?”
“I…umph…” Lyra groaned.
“C’mon now, I won’t be able to give you what you need if you don’t voice those needs properly,” Anon snickered, and Lyra’s resolve broke as she finally spoke up.
“I NEED YOU TO BREED ME!” Lyra howled, her whole body shaking as she resisted the urge to slam herself back onto his dick. Anon snorted, moving both hands back onto her as and slamming his length back inside Lyra and repeating the motion as he jackhammered her into oblivion. His heart soared as he was able to hear Lyra’s demands devolve into gibberish as drool dribbled out of her lips and onto the floor. Her eyes were rolled to the back of her head as she experienced his cock hitting her g-spot, knowing that her soured thoughts were danced away by a good fucking. His as well, as he no longer had to walk past stallions, see their massive junk hanging about, and feel a sharp pain in his chest as he knew his cock wasn’t even a third of their size. No, with his strange magical weapon unlocked, he could give mares even better dickings than many of the stallions in Ponyville. Even though the thought was tempting, Anon did his best to remain focused on the mare beneath him. After all, his ability would mean nothing if he couldn’t use it properly.
Suddenly, Lyra’s back arched as a scream escaped her. Anon nearly stopped in his motions to ask if she was okay when pints of marecum splashed all over his cock, thighs, legs, and even feet as it cascaded onto the floor like lewd waterfalls. Lyra forgoed Anon’s previous orders as she proceeded to thrust against his cock again, riding out her orgasm without thinking about her human roommate behind her getting drenched more than any sexual encounter before him. Anon gulped as he could’ve only imagined the sexual tsunami that would’ve occured had he made her cum at her original size. Lyra kept screeching throughout her orgasm, and Anon felt a cold jolt throughout his body at the realization that somepony could hear them. Coming up with an idea off the top of his head, he managed to lift Lyra up and flip her around onto her back, towering over her as he leaned in and swept her in a heated kiss.
Wrapping his arm behind Lyra’s head and pressing their foreheads together, Anon gently pushed his tongue past Lyra’s lips and allowed their tongues to tangle against one another, dancing against each other as if they were getting acquainted with each other, but not frantically fast enough to be tongue-wrestling. Another two shots of marecum escaped Lyra’s pussy as her eyes fluttered at the overwhelming warmth spreading throughout her whole body. No magical spell even came close to the complete fullness she was feeling right now literally and figuratively, and Lyra pushed further into the kiss as she in turn wrapped her hoof around Anon’s neck as well. She barely noticed that she was partially laying in her own cum as she got swept up in the moment, savoring the slower thrusts that Anon was now giving her as they both focused on their makeout. Throughout her life, Lyra only had a few hookups, but they were all stallions that were one-pump chumps that didn’t even give her a kiss this heavenly, let alone an orgasm on top of that. She felt bad for all the other straight and bisexual mares that wouldn’t get the unworldly experience of being plowed and pleasured by a human man. Perhaps she could speak with Twilight on getting more humans here?
Lyra moaned into Anon’s lips, deciding that her thought would be a concern for another day, the aquamarine mare wiggling downward as she longed for her mate to pick up the pace again. Anon parted the kiss, quick to get an inhale of air as saliva was the only thing currently connecting their lips. Lyra fully opened her eyes, staring wide-eyed at Anon with her mouth hanging open as if she was seeing him for the first time. Anon pulled back a little more to disconnect the saliva between them, and gave a strong thrust that caused Lyra to give out a sharp high-pitched moan, her eyes rolling to the back of her head again.
Anon moved his hand back from Lyra’s head, now caressing her cheeks and staring at her far-gone expression as he resumed jackhammering into her again. Lyra hardly stayed quiet, moaning loudly as every few seconds, more shots of marecum would coat Anon’s dick. After her fourth orgasm, it became way easier to pound her with one hand underneath her ass to hold her up properly.
“Um, Lyra?” Anon spoke up. “I’m g-getting close-”
“Cum inside!” Lyra blared out, well aware of what could happen. Anon gave a few more thrusts before he hilted himself inside of Lyra’s pussy, his balls firmly pressed against her as he emptied them a second time inside of his pony roommate with a content sigh. As he thought of what happened earlier, he smirked all the more as he made sure every last drop was deposited within Lyra’s depths. Letting go of Lyra’s ass, slowly pulling his softening cock out and letting the mare land back onto the floor with a sticky splash, Anon looked over her and the bottom half of his body. They were absolutely stinking and drenched with Lyra’s marecum, and Anon knew that later on that day, the two would need to throw every spell and cleaning supply at the living room in order to fix it. As Lyra’s awestruck gaze finally returned back to normal, she winked at Anon as she lit her horn up, causing a small plug to appear from the kitchen and flying towards her. The plug firmly nestled itself inside Lyra’s pussy right before Lyra rolled off the floor and stained her hooves even more with her own sticky marecum.
“Something to keep your seed inside for a little longer,” Lyra smirked, walking up to Anon’s leg and rubbing her cheek against it, getting her marecum on it before she stared up at Anon with wide eyes. “Shouldn’t I have…shrunk again by now? Is it only a one and done kind of deal?”
“We can worry about that later,” Anon insisted, petting Lyra’s head. “Let’s get us both in the bathtub, shall we?”
“Oh, r-right,” Lyra chuckled with a blush. “That seems like a great idea before anything else.”
Anon walked into the kitchen, grabbing a washcloth and cleaning the bottom of his feet before walking over to Lyra and drying her hooves so they could both go up the stairs without leaving prints behind. Anon looked down the hallway and went to the bathroom on the first left. The bathtub was more accurately the size of a small pool due to Lyra’s former size, leaving more than enough room for Anon and his smaller companion to step into the tub and turn on the hot water. Lyra faced the opposite direction and flashed her plugged pussy at Anon as she waited for him to begin cleaning her. As Anon took off his shirt and sat down in the tub and grabbed a bar of soap nearby, he began thoroughly scrubbing Lyra’s ass cheeks and leaving soap bubbles to replace her marecum when Lyra shrieked. The pussy plug popped out of her and landed in the tub water as Lyra shrinked once more before Anon’s eyes.
With the progression of Lyra getting way smaller this time, Anon’s heart was racing as he worried his roommate would shrink to the size of a mouse. Or worse yet, an ant. Lyra gulped as she saw that Anon was getting taller and taller, her limbs were barely even limbs as they shrunk to be less than a foot long. Her face was tiny enough to be completely covered with one hand, and Lyra gulped as she stared at Anon as he towered over her, even as he was still sitting and staring down at her with his jaw dropped. He blinked at her before reaching over and picking her up with both hands.
“Lyra…you’re the size of a cat!” Anon gawked, moving her up and down as if he was playing with an actual pet. Lyra heavily blushed and wiggled in Anon’s grip as she scowled and looked away from him.
“N-No, I’m a little bigger,” Lyra stammered, her voice carrying a slightly higher pitch with her smaller size. Anon giggled and began petting Lyra’s mane with one finger, grinning at her.
“You’re so cute,” Anon cooed.
“Am not!” Lyra protested, and Anon didn’t fail to notice her pussy dripping onto his crossed legs, and his eyes widened at the sight.
“Lyra…are you getting off to this?” Anon raised an eyebrow. “You don’t mean to tell me that you’re enjoying being this small?”
“Nnnng,” Lyra squeaked, still refusing to meet Anon’s gaze. But her body said it all, as the mare was blushing more heavily than the last two rounds they shared. Holding Lyra up with one hand instead of two, Anon used his free hand to turn off the water and throw the pussy plug out of the tub. Then, he used his free hand to reach for his junk, taking the opportunity to stroke himself off while Lyra was still distracted with her own arousal. He kept at it for another minute until he was fully erect again, his heart racing at the idea of comparing his cock’s size to her current body size. Could he even penetrate her fully? His curiosity surged into his cock as it throbbed, and he stopped jerking off to hold Lyra with both hands. Lyra, who had been humping the air mindlessly, didn’t even notice a single thing until Anon lowered her onto his crotch. Anon slapped his cock onto the front side of her body, and studied the comparison in size. His cock was able to reach to right below her ribcage, and he knew very damn well that this third round would rearrange her organs. Lyra gasped loudly as she stared right down at his leaking cockhead, feeling nervous jitters throughout her body until she realized something. Closing her eyes, she held her breath as her horn lit up, casting a magical spell that channeled itself throughout her entire body with a green aura the same color as her. The spell worked its magic for a good minute before the green aura disappeared, followed by Lyra giving a loud gasp for air.
“S-Sorry, you wouldn't have been able to screw me otherwise,” Lyra apologized.
“What did you do?” Anon asked, tilting his head.
“A spell that I’ve read about, it’s supposed to prevent the inserted object from hurting any vital organs,” Lyra explained. “And on top of that, any movement that touches my bones and organs is supposed to bring pleasure instead of pain. Doctors use it here all the time for surgeries and other procedures.”
“Wow,” Anon blinked at Lyra’s explanation. “I don’t suppose you have a doctor friend?”
“No, I just read it from one of Twilight’s books,” Lyra admitted with a chuckle. “You have no idea the kind of stuff Twilight has in her library.”
Anon nodded, knowing very well that he was dropped off in the Equestria that existed long before Tirek had destroyed Twilight’s library. He was thankful, having stopped by a handful of times to read up on Equestrian culture and the occasional Daring Do comic. None of the books explained the ponies’ gigantic size in comparison to him, but that mattered little as he lifted Lyra up once more to press the tip of his cock to her pussy. He tightened his grip on Lyra, not enough to hurt her, but enough to get her to gasp as she stared down at him. But she was no longer staring down at him because she was bigger, Lyra realized with a shudder, but because he was holding her like one would hold a fleshlight right before putting it to good use.
Anon pushed, finding it far more difficult to enter Lyra’s hole in comparison to when he sank inside her big pussy earlier. Lyra looked at him as he struggled, and used her horn again to force herself down on his cock. As the tip popped in, along with the first two inches of his cock, Lyra threw her head back and screamed.
“OH BUCK!” Lyra howled. “Deeper!”
Anon’s eyes nearly popped out of his skull as he processed the mini unicorn’s demand. Had the spell worked that well? Or was she just that hungry for human cock? Perhaps both?
Anon grinned as he lowered her further down onto his cock until he was almost entirely inside her, staring in awe at the imprint of his cock appearing just right above her stomach area. With her spell and her clenching pussy working in tandem, her entire body fit around his cock like a furry glove. With Lyra’s eyes rolled back as she embraced the mindless mushy state she was experiencing, Anon made the final stretch to hilt himself inside of her tiny cat-sized body. Then, he lifted her up until only the tip of his cock was still inside her, and proceeded to slam her back down on his cock. Any fear he might’ve had of seriously hurting her had dissipated into pure euphoria as he witnessed her unrestrained smile, her tongue rolling out of her mouth as her drool fell into the tub water that would likely no longer be hot by the time the two were done.
Anon kept at the motions, lifting Lyra up a little only to slam her back down like a sex toy specifically catered to his desire in that moment. As he proceeded to rearrange her insides, Lyra felt a spark of pleasure with each time his cock brushed against her organs, almost as pleasurable as if he was hitting her g-spot over and over again. It didn’t take too long before her orgasm seized her for the fifth time that afternoon, happy gurgling sounds escaping her mouth as her entire body shuddered around his cock, marecum spilling down his cock and into the bath water. Anon didn’t even care, long abandoning the point of the bath they started to jackhammer into her and get as many orgasms out of her as possible. They could turn the bathtub into a cum-bath for all he cared, as long as he continued to see the face of pure joy on Lyra as he fucked orgasms into her. He barely noticed his own pleasure as he kept thrusting, getting a sixth and seventh orgasm from her all within the span of five minutes. After her eighth, Anon found himself not able to last much longer due to the past two orgasms he experienced. His cock would be spent shortly, but he had one more final act to conclude their sexcapade on.
Hilting himself once more inside of Lyra, Anon lunged and kissed her, using his right hand to hold her small head there in place. Granted, his lips were bigger than her own at this point, but Lyra didn’t care as she inserted her little tongue into his mouth. It stood no chance against the giant serpent that was Anon’s tongue, which rushed into her own mouth and nearly cut off her oxygen, exploring her smaller mouth for as long as he dared before pulling out of her mouth and resuming his fucking. The makeout session, paired with the fact that he had truly dominated her with his much bigger size, sent him to the peak of pleasure as he hilted himself inside her for the final time and came.
As he spurted shot after shot of his cum inside of her, he had no idea of where it was inside her until he saw her belly bloating to the point of her appearing like a queen cat pregnant with a hefty litter. With her spell in full effect, he was able to get all of his seed to go inside her without a drop spilling out of her. He laid his head in the cum water, pulling Lyra out of his cock and onto his chest as his flaccid cock was finally spent, allowing the both of them to pant and take deep breaths in the wake of their fucking session.
“Oh…mother of Celestia,” Lyra moaned. “We better finish this-woah!”
Lyra gasped as Anon scooped her into his arms and stood up, walking out of the bathroom and towards the bed without a care about the water and marecum dropping onto the floor as he kicked the slightly opened door to his room at the end of the hallway wide open. Walking over and flopping onto his bed with Lyra in his embrace, Anon passed out like a light as he began snoring within seconds.
Lyra paused, a lot of questions whirling in her head, like when was she going to return to her normal size? Would she return to her normal size? How in the heck were they going to clean the entire house of her cum? But like Anon, sleep was demanding her presence. And after an amazing fucking session like that, Lyra couldn’t think of any better way to end it on, than with a cozy rest with her roommate who had ended up claiming her in a way she never expected…
…but a way she was more than happy with, as she nuzzled her head against Anon’s chest. With her heat completely satisfied, Lyra closed her eyes and went to sleep along with her human.