Moondancer was studying late in the afternoon in the Canterlot library. She had spell books piled all over her desk with quills and parchment scattered equally on the other side. Her red and purple mane was frizzled outward in all directions and her eyelids were drooping from exhaustion. The spell she had been researching on was of great importance to her and she now had to battle against her own drowsiness to master it.
She drearily looked up at a clock that hung above her head and gasped, shooting her eyes wide open. The time was now five o’ clock in the afternoon and she had promised to meet her other friends at Donut Joe’s shop. She yawned as she got up from the desk and stretched herself, gently smacking her lips as she got up from the chair and walked towards the door.
I should probably cancel my engagement. I’m sure my friends will understand.She thought as she began walking through the dimly lit hallways and bookshelves as she went to find Twilight to see how much progress she had made.
She wandered the halls for quite some time until she found where Twilight had been for the whole day, studying the same spell. However, she was nowhere to be seen and all her books had been put away.
“Twilight? Where are you?” Moondancer moaned as she began looking around for her friend. “You were supposed to help me study today!” She turned and walked down the hall to see Twilight walking towards her. “Oh. There you a—”
“Hey Moondancer! I figured out the age rejuvenation spell!” Twilight ran over to Moondancer with a spring in her step.
Moondancer sighed in relief and wiped some of the sweat off of her brow. “That’s great and all, Twilight, but we still need to test it.”
Twilight nodded. “Yes, but it's still only experimental. I don't know if I should just test it on a pony out of the blue like that.”
Moondancer looked at the clock and took a deep breath before walking taking a step forward. “Test it on me then.”
Twilight jumped backwards. “Wait, what?! Why would you want to volunteer so fast? Don’t you feel worried about what could happen?”
Moondancer continued, “I have to get going to meet up with our friends. Plus, I wasted your entire trip here in helping me. I think it's the least I can do.”
“What do you mean by that?” Twilight cocked a brow.
“I didn't even tell the rest of them you were coming. This spell is very important to me and my research on age rejuvenation and I’ve wasted too much time already.” She nodded. “I think for all of the stuff you’ve been through today, I should be the test subject.”
“Are you sure, Moondancer? I think I should test it on plants first just to be safe.” Twilight rubbed the back of her head.
“The report is due tomorrow, Twilight.” Moondancer smiled. “Besides, we need to meet our friends before they think we ditched them.”
Defeated, Twilight sighed and illuminated her horn. “Alright then, Moondancer. Just hold still for a second...”
Twilight’s horn lit up and a magical beam slammed against Moondancer’s head and caused spirals to appear in her eyes. Her head swivelled and wobbled before she fell unconscious and flopped onto her back. A blast of light emanated from where her friend once stood, blinding Twilight momentarily.
“Yes! Now I just need to test it to see if there aren’t any side effects...” Twilight rubbed her eyes and readjusted to the light to look around for Moondancer.
There by her feet, was a tiny yellow foal with barely a lock of purple and red for hair sitting before her. She had tiny velvet eyes which gawked at her while a smile began to form on her face. She flailed her tiny limbs, babbling as she looked up at Twilight.
“No… No!” Twilight looked down at Moondancer. “When I said that it would make you younger, I didn’t mean it like this! Not like a newborn foal!” Her eyes darted around the library as sweat began to dribble down her forehead. “Your friends are expecting you any minute! You can’t be seen like this!”
She materialised a diaper out of thin air and slipped the padded undergarment underneath Moondancer’s rump, sliding her tail perfectly through the hole on the back. Once that was done, she taped the tabs over her crotch and made sure that it was securely placed around her body by giving it a slight ruffle. The little foal began to whimper but Twilight hushed her and gently rocked her in her arms. Then she used a spell to conceal both of them from the rest of the world.
“This spell could be groundbreaking for us both, Moondancer. But I need to get you home so I can figure out how to change you back.” Twilight turned towards Moondancer who was now gathering up her mane and putting it in her tiny mouth. She couldn’t help but blush at how the foal gurgled while eating her own hair. “Alright, Twilight. You’ve got this. Don’t make it seem like you’re panicking. You’ve dealt with tougher spells than this. Everything should be fine...”
As they walked out into the sunset, Moondancer slowly began to wake up. After having to battle with her eyelids for the study session, she now opened them up effortlessly and saw that she was on Twilight’s back. She wanted to get off, but she heard a crinkling noise that sounded with every step Twilight took.
Moondancer looked down at the diaper that now cocooned her groin and nether regions. She raised a brow at the thing and wanted to make some sort of reaction to it, but all she could let out was a low and only barely audible coo. She gave it a gentle poke, hearing it crinkle once again. For some reason, wearing the diaper felt right for her. She didn’t feel like taking it off and was enamored with how comfortable she now felt.
The two of them walked up to Minuette, Twinkleshine, and Lemon Hearts at Donut Joe’s shop, seeing them all talking and laughing together with each other. Once they got close, Twilight cut off the spell and revealed herself, while also leaving Moondancer invisible so that the ponies wouldn’t see her and her diapered rump.
“Hi, Twilight!” The three ponies all chorused together.
“Hey, girls. Good to see you.” Twilight smiled and shook hooves with the three unicorns.
“So, was Moondancer able to come?” Lemon Hearts asked as she looked around.
Twilight jumped at those words and stared back at her rump, twitching the muscles in her forehead. ”Moondancer? Uh… Nope! haven’t seen her for hours.”
“Aww. We all had a fun day planned.” Minuette looked down at the ground briefly before staring right back up at Twilight.
Twinkleshine rolled her eyes. “She’s probably distracted with studying again. You know how she is, always wanting to learn.
“Hey. I’ve got an idea. Why don’t you come instead?” She slid towards Twilight.
Twilight simply rubbed the back of her head and blushed. “Well, I wouldn’t want to be a fourth wheel, if anything. But thank you for the offer anyway.”
“Ah, C’mon, Twilight. It’ll be so much fun!” Minuette squeaked and nodded. “We weren't able to go out the last time you came by.”
“Well, again, I must thank you for the offer, but I have to decline.” Twilight simply smiled back at the girls. “Something came up at the library and I don’t really want to be much of a bother.”
Moondancer turned her head from the diaper and looked over towards Twilight’s friends. She tilted her head and cooed once again as she gazed upon them. Despite the fact that her mind had been altered by Twilight’s spell, she still had a nagging suspicion that she recognized the ponies. As she looked at them, she unintentionally put her hoof into her mouth and began sucking on it.
“Hey, Twilight?” Lemon Hearts heard Moondancer sucking and walked closer towards her. “What’s that sound?”
Twilight jolted her head back towards Moondancer and began to sweat as she turned to the three mares. ”I don’t know, girls. But I think it’s coming from over there.” She pointed towards a nearby house where a pony was cleaning her clothes, wringing the towel out over a bucket. All of the ponies watched as Twilight used another spell to silence the noise.
“Oh. Alright then.” Minuette grinned once again and nodded. “That explains that.”
“So anyway, I thought we could go get something to eat.” Lemon Hearts chirped. “There’s this great new place that opened up on Restaurant Row recently.”
Twilight’s eyes shone at that remark. “While I did have other stuff I wanted to get done tonight, I’m sure that I could fit that in.”
“Great!” Minuette nearly bounced on the spot as she lead Twilight down the streets. “Come on, Twilight! Let’s go have some fun!”
Hang in there, Moondancer. Mama’s gonna have to be extra careful tonight… Twilight took one last look at Moondancer, who now had her entire hoof covered with saliva as she finally pulled it out of her mouth. She watched the infant-minded pony giggle and clap, spreading the slimy liquid onto her other hoof.
Soon, the five ponies were all in the shop, slurping away at bowls of white and grey soups. They calmly and quietly ate each spoonful delicately, so as not to ignite their throats or spill it on themselves. They were talking among each other about many different topics, most to do with the spells that they had learned and how much they had grown as friends since Twilight’s last visit to Canterlot.
As Twilight herself ate the soup, she had to be extra careful not to let the others know that Moondancer was quietly on her back. She often at times had to hide her spoon from the others as she brought it up to Moondancer’s mouth and put it in, so to make sure that she was eating her fill as well. Moondancer herself was constantly spitting up the excess soup and smearing it on Twilight's mane.
“So, you and Moondancer had plans already?” Twinkleshine asked after eating another spoonful.
“Yes. We were working on a spell to restore a pony’s youth, be it mentally or physically.” Twilight nodded and took another sip of the soup, proceeding to feed Moondancer once again. “While the spell turned out to be a success, she got really tired and decided to call it a day earlier than I had expected.”
“Yeah. I guess I can understand that.” Twinkleshine pivoted the spoon on the table for a short moment. “Overworking yourself can leave you quite tuckered out. I just hope she takes it easy tonight.”
“I’m sure she will.” Twilight secured Moondancer in place, as she was beginning to slide off of her back. “Moondancer’s a tough nut to crack. She’ll be back on her hooves by tomorrow morning.”
The ponies resumed eating their food, making sure that they took care when handling the tepid soups. Even though the temperature was beginning to diminish, it would still be enough to at least provoke a shock out of them if they spilt it. There were a few more topics of discussion that the ponies shared, with laughter following most of them.
After a long night of playing with her friends, Twilight and Minuette finally came up to Minuette’s house and walked through the door. The two of them climbed the stairs slowly and eventually walked into a simple bedroom with a bookcase on one side and a window on the other side.
Moondancer was still on Twilight’s back, sucking away on her hoof as she bobbed on her friend’s back. However, now her eyes were shut and she was fast asleep, deep within her own foalish thoughts.
Well, I’d say that everything worked out pretty well tonight, wouldn’t you say, Minuette?” Twilight asked, walking up to the bed and sliding Moondancer off onto it.
“Yeah.” Minuette let out a tiny chuckle. “Never knew that Lemon Hearts had moves like that.” She rubbed her hooves against the blue bedsheets and looked out the window. “It’s such a shame that Moondancer couldn’t come today. She would’ve had so much fun.”
“Oh, I think she was with us the whole night. Just in spirit.” Twilight nodded and slowly illuminated her horn.
“Whatever do you mean by—” Minuette let out a gasp as Twilight cut off the invisibility spell, revealing the diapered Moondancer fast asleep on the bed “—wha? Moondancer?! I thought you were back home!”
“Like I said earlier. Moondancer and I were experimenting with the age rejuvenation spell and I used it to turn her into a foal.” Twilight frowned at the sight on the bed.
Minuette looked at the sleeping Moondancer, chewing on her hoof as she snored, melting the mare’s heart all the way. “Aww… She’s adorable.” She gently patted the foal’s belly, feeling how soft her fur and skin as the back of her hoof ran over Moondancer’s body.
“The spell was supposed to make her lose certain aspects of age, like wrinkles and grey hair. In turn, it would also make her skin feel much softer.” Twilight gently sat down by the foal. “But I clearly messed the spell up and now she’s become a full-blown foal.”
“So, what we do?” Minuette tilted her head. “We can’t just leave her like a foal. I mean, granted, she is much cuter now, but she needs to grow up like everypony else.”
“I need to go back to the library and research the book again to see where I went wrong.” Twilight tipped her hoof. “In the meantime, somepony needs to keep an eye on her so that she doesn’t hurt herself.”
“Well… I can’t really take care of a foal yet.” Minuette shook her head and shrugged. “I don't even have any supplies or any experience with babies.”
“I'll pick you up some foal supplies tonight. Heck, I’ll even give you some lessons as well.” Twilight got up from the bed and walked up to the door. “Hopefully this should be just for today. I don’t want this whole foalification thing to be a long-term or permanent effect.”
“OK, Twilight. Just for you.” Minuette gave Moondancer a motherly gaze as she stroked the foal’s fur. “I guess a day with her won’t hurt.”
“Thank you so much for this, Minuette.” Twilight shook Minuette’s hoof and walked towards the door. “Oh! And before I forget, can you please keep this quiet? I'd rather not have everypony know she's turned into a foal.”
Minuette just gave a nod and curled up with Moondancer, holding her close to her chest as the foal gently grasped at her fur. Twilight simply smiled at the two of them, while proceeding to tiptoe out of the room, silently closing the door behind her.