AgeRe + PetRe Reader x BNHA Oneshots

Studying with the Boys (CG! Denki, Kirishima, Sero)

CW: Swearing, Breakdowns

┌
   Pronouns: he/him
   Big Age: 16
   Little Age: 3
   Quirk: Levitation
   Place: UA Student Dorm
   Rooms
   Caretaker(s): Denki
   Kaminari, Sero
   Hanta, Eijirou Kirishima
   Situation: Homework has
   stressed Y/N out so much
   that he has to regress to
   be calm again. How will
   his three best friends
   react?
                            ┘

Y/N sat at his desk in his room helplessly, head in his hands as Sero, Denki and Kirishima struggled with their own work behind him. They were all so far behind that Aizawa had directed them to take half a class off to do their homework and Denki had complained the whole way to the dorms. Now, the three boys were scuffling around on the bed and the floor, swapping papers and complaining about the teachers.

"I just don't get this part!" Denki groaned. "Y/N! Help us!"

Burying his head further into the textbook, looking for anything that clicked, Y/N ignored his friend's plea. Instead, he focused heavily on not letting the tears pass over his eyelashes. He couldn't let them see him like this.

Kirishima's hand was suddenly place don his shoulder in an almost comforting manner. "Aw, c'mon Y/N," he pouted. "Come sit with us. We could use your brain."

The sudden appearance of another person prompted the tears to roll off of Y/N's face and onto the page, slipping relentlessly into his safe space. Oh shit, oh fuck, shit! This is not a good time, little me!

He leaned over and placed his hands over his eyes, propping himself up a little on the desk. Sobs burst from his throat as the hand left his shoulder and Kirishima knelt down beside his chair. Sero jumped up from the bed and rushed over, the closest of the three, with Denki right behind him.

God, Sero please save me from this mess, Y/N pleaded silently. Sero at least knew that he had a safe space, but the others didnt have a clue.

"Woah, are you ok, Y/N?" Sero asked carefully, aware of how loud his voice was. Kirishima, can you get some water from the common room?"

With the speed of a highly distressed mother, Kirishima left Y/N's side and was replaced by Denki as Sero started rubbing circles into the sobbing boy's back. Denki was lost for words and simply hugged into the boy, trying with every ounce of might he had to comfort him without having to use words.

With the warmth of the boys of on his back, Y/N lifted his head, tears still rolling down his cheeks and entirely small.

A shaky voice whimpered, "Dendi?" and the yellow-haired boy dipped his face down to meet it. "Fank yoo, D-Dendi," Y/N spoke softly, grabby hands reaching out for his friend.

"Uh, Y/N, you good?" Denki asked, backing away half a step. "Why the hands?"

Sero quickly turned Y/N around and hugged him close, trying not to be too obvious as he covered his ears. "Denki, he uses a coping mechanism called littlespace to deal with stress. We just need to take care of him for a moment until he feels safe enough to be big again." He uncovered the little's ears carefully, reaching for a drawer at the bottom of the desk. "It basically means he's a baby until he's not anymore."

"Oh, I get it! One of my friends used to do that in middle school," Denki remarked.

"Shh!" Sero hissed, flicking his eyes up to meet his friend's. "Noises are a big thing for him." His hand rummaged further in the drawer until he pulled out a pacifier big enough to fit in Y/N's mouth.

Kirishima came running back into the room with a litre bottle of cold water, making Y/N cover his ears and whine. Sero was quick to take off his school jacket and place itover the little's ears for security before grabbing the bottle from his friend. Denki held up a finger over his mouth to signal the red-headed himbo and whispered something in his ear. Kirishima's face stretched into surprise, then a shred of happiness shone across his eyes.

"Can I talk?" he asked Sero quietly.

"Yeah, just not too loud," he replied, cleaning the pacifier in an unused snack tray.

Y/N looked wistfully up at Kirishima as he leaned in and tilted the little's head up towards him. "Hey, little one," he cooed softly. "Are you still sad?"

Y/N nodded with a hum.

"Ah, ok, well we can't have that can we?" he breathed, picking the little up.

Sero glanced worriedly at the two, then popped the pacifier in Y/N's mouth before they went too fsr from the desk. "Be careful, Eijirou!" he whispered pointedly.

Denki noticed they were heading towards the bed and swept their studying equipment off silently, revealing all of the hidden F/C (favourite colour) sheet set. Placing Y/N down carefully on his back, Kirishima smiled sweetly, making the little giggle.

"Do you wanna study with us, Y/N?" he asked. The little shook his head. "Well, what would you like to do while we study?"

Sero lifted a sensory book out of the drawer and offered it to Kirishima, exciting the little on the bed. "Book! Book!"

"That's right, book!" Kirishima chuckled as he handed it to Y/N. Turning to the other two boys, he added, "Y'know this means we're gonna have to do his work, right?"

Sero sighed and Denki added in an exasperated, "Yeah..." as they all bunched onto the floor again with their work spread out beneath them.

"You're quite the troublemaker, aren't you, Y/N?" Sero teased. Y/N took out his pacifier and stuck out his tongue, making the other two boys laugh. Sero turned his attention to Kirishima. "And you're amazing with kids, huh?"

Kirishima's face and ears blended into his hair as he muffled, "Let's just get this over with."