REQUESTED BY: Dumbass_45

A/N: Heya! Here's one for an age regression! Enjoy! (Note that it says Komaeda and Reader because she spends the majority of the fic as a child. No underage shenanigans will be happening here!)

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He honestly didn't know what he was expecting.

When (y/n) had told him that she had to cut their outing short so that she could go help Iruma with something, he hadn't expected said inventor to call him frantically twenty minutes later begging him to come down to the workshop to help her with (y/n).

"Please please please don't be mad at me!" She'd wailed through the phone, "but something went wrong with the experiment-- a- and (y/n) is-- just please help me!"

So he'd rushed down there, threw open the doors to the best of his ability, and was greeted with Iruma glomping him frantically.

"OH THANK GOD," she exclaimed. "Long story short, the experiment failed and (y/n) is... little?"

"Little how?" He frowned, trying to look past her.

"W- well--"

"Eda-kun!" A young voice cheered, snapping both of them out of it. They turned to stare as a two-year-old (y/n) came toddling up to them, her shirt hanging off her frame and nearly tripping her up had it not been for her holding the ends like a dress.

"Is she... n- naked... under there?" Nagito stuttered as he stared at the little girl.

"She shrank and turned into a baby, so yeah, I don't have anything that fits kids here!" Iruma seemed to be panicking a little more.

"Eda-kun, Eda-kun," (y/n) was chanting, tugging at his pant leg. "Howd pwease!"

The girl's awed gaze made him blush a bit. Even though she was -now- a child, he still cared about her deeply. I don't think I can handle her looking at me like that... she's too adorable as a baby.

He scooped her up into his arms, mindful of her shirt. Her tinier hands found his shoulders and clenched the fabric of his shirt.

"I have no idea how long she'll be stuck like this," Iruma explained with a guilty look. "Please keep an eye on her until I can find what went wrong!"

Nagito heaved a sigh. "Alright, I can do that. Please don't involve (y/n) in your experiments anymore if this is the result."

"Uh, s- sure," she muttered, walking away. "Maybe I can get Kaede to do it..."

He simply shook his head, giving (y/n) a glance. She was smiling, though it didn't look genuine.

"Eda-kun, woom pwease," she said quietly.

He nodded.

As they got back to (y/n)'s dorm room, he set her down on the floor and she looked around with a determined expression on her face.

"Wight," she said to herself, smacking her fist on her open palm. "Cwothe."

Nagito sat on her bed and watched as she toddled to her dresser, pulling the middle drawer open. She hopped up and down to catch a look, her determined look fading to a helpless, frustrated one.

She looked back at him desperately, tears budding in her eyes. "Nodding fits! Be wiff Nami!"

He gave a light sigh, scratching the back of his neck. Ah, that's right. (y/n) had mentioned studying with their friend this evening. "Nanami will understand if you have to cancel, I'm sure."

"But... but..." she teared up and angrily wiped them away. "Dammit... don' wanna cwy..."

Hearing a child swear was endlessly amusing, though he probably shouldn't be encouraging it.

"Hey hey, cheer up. Maybe Nanami can help us? The Ultimate Seamstress is probably with her right now, right?"

"Wight..." she sniffled, wiping her eyes dry. "Wight! Stuh- ddy, wiff seam!"

"I'll call Nanami and catch her up," he offered, pulling out his phone. "In the meantime, do you need anything?"

"... hungwy..." (y/n) shyly admitted, poking her fingers together. Her chubby cheeks bloomed red in embarrassment as her stomach growled.

"Okay." Nagito smiled at her, making her hide her face in her hands. "I'll pick you up something on the way back."

It took a while to explain it to Nanami and the seamstress (though the girl immediately demanded to visit the child so that she could take her measurements), but as soon as he entered the room again with a box of food and the girls, (y/n) was sitting on her bed, legs swinging, trying to scroll through her phone.

She looked up from the device and her face brightened. "Eda-kun!"

"She's so CUTE!" The seamstress squealed, rushing past him to the bed. "(y/n) (l/n), right? I've looked up to you for such a long time! Do you mind if I take your measurements, Senpai?"

"N- no," the girl stuttered, surprised at the attention.

"Komaeda, could you please wait outside?" Nanami asked, gently taking the food from his hands. "I'll call you in once she's done."

"Sure." He nodded, flashing (y/n) a smile on the way out.

A few minutes later, Nanami called him back in. (y/n)'s shirt was adorned with a length of (f/c) ribbon acting like a belt at the waist, the bottom hem neatly folded over and held with safety pins. She looked extremely bashful in the underclassman's presence, said girl scribbling away at a notebook and chattering a mile a minute.

When she spotted him, she smiled and waved. "Eda-kun!"

He walked over and sat next to her, mindful of the open box of food in her lap. "Is everything going well?"

"I should have a temporary outfit ready within the hour!" The seamstress chirped, snapping the book shut and patting (y/n)'s head. "Thank you for working with me, senpai! I'll see you in a bit!"

She bid Nanami farewell and flounced out of the room, leaving the room's occupants amused.

"She's very hyperactive," Nagito observed.

"She's sweet," Nanami chortled. "I need to get going too. Are you well enough alone here, Komaeda?"

"I can handle her," he assured, patting the girl on the back. She made a cute noise as she ate her rice.

"Alright. Good luck you two." She gave (y/n) a genuine smile and patted her head as well.

Once she was gone, Nagito glanced over at (y/n)'s phone. Clearly she'd retained her general knowledge, just with a child's way of speaking. In the search bar was 'what to do if you turn into a kid?' though the results were disappointing.

He lay back against the wall and watched (y/n) finish her food. With a satisfied huff, she set the box and utensils aside and snuggled up to her pillow.

"Do you want to take a short nap?" He asked quietly, gently running a hand through her hair.

"Mhm," she mumbled. "Wake me... when cwothes..."

As she drifted off, Nagito's eyes softened and he brought her closer. She hid her face in his shirt, burrowing into his side.

This is the closest I've ever gotten to her, he thought to himself. His hand never stilled its path through her hair. And to think, all it took was a malfunction.

He huffed a small laugh, leaning in to press a feather-light kiss to her forehead. I wouldn't care if things stayed like this. Just as long as I can be near.

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A/N: I hope you enjoyed! Pretty fluffy, but I really do like the kid!trope.

Please tell me what you thought, feel free to request more, and I'll see you guys later!