★Katsuki Bakugou x Reader One Shots★

❦Katsuki X Reader-Quirk Malfunctions

"K-K-Kacchan... he's..."

"How did this even happen?"

"What are we gonna do?"

The class of 1-A surrounded the ash blonde who was sitting on a desk in the classroom. Aizawa had an important meeting to go to about a trespasser in UA. The trespasser has a quirk that can change people into the younger them. Katsuki just so happened to get hit with the quirk, and that's where they are now. His girlfriend, (Y/N), couldn't seem to hold in her squeals.
"He's adorable!"

Katsuki's crimson eyes fell on (Y/N).
"(Y-Y..Y/N).."
His little arms outstretched to (Y/N), wanting to be near her. He was only about 3 years old. (Y/N) had tears in her eyes when she saw Katsuki reach out to her.
"Aww~! Come here baby~~."
(Y/N) picked the fluffy blonde up off the desk, holding him in her arms. The class all gave each other worried looks.
"How are we supposed to change him back?"
Midoriya asked with a hand on his chin.
Todoroki shrugged his shoulders.
"I don't know. I figured you would know about it since you've written just about every quirk and it's information inside those notebooks of yours. I mean, we were even on a date and you wouldn't stop writing."

Midoriya blushes at the mention of him on his date with his boyfriend.
(I ship them, sorry if you don't )

(Y/N) held Katsuki in her arms, still unable to get over the fact that he was as little as he was.
"Well take your time figuring it out. This is heaven."
Katsuki placed his head in the crook of (Y/N)'s neck causing tears of pure love to build up in her eyes.
"We should get baby clothes. Who knows how long he's gonna be like this."

Todoroki shrugged his shoulders once again.
"Why not? I can pay for everything. I took my dads credit card."
Midoriya gaped once he saw the credit card in between Todoroki's fingers.
"Doesent he get mad at you?"

"Who ever said he knows where it is?"
Todoroki looked at the green haired boy with an oh so innocent look causing the class to sweat drop.

"Okay. So, me, Midoriya, and Todoroki will go buy some things for our little baby here~. We shouldn't be long."
(Y/N) said, slipping on her backpack strap over one shoulder. The class watched as (Y/N) continued to talk all cutesy with baby Katsuki.
"I'm gonna take good care of you okay~? That's right~, I'll stay with you~."
Midoriya and Todoroki pulled their book bag over their shoulders before following after (Y/N) and the mini bomb.

==

The group of teens arrived at the store quickly with the help of Katsuki's mom. (Y/N) texted her to tell her what had happened and she was more than excited to help out and see her son as a child again.
"I totally forgot! They already have baby clothes of all of our costumes! That's so cute! Midoriya, help me find Katsuki's! They have to have his here!"
(Y/N) squealed as she and the green mop of hair began searching through the clothes. Meanwhile, Todoroki was staring blankly at a baby outfit based off of his father.
"Terrifying."

"I found one, (Y/N)-Chan!"
Midoriya said as he held out a baby outfit just like Katsuki's hero outfit.
"Omg! That's adorable!"
(Y/N) took the outfit from Midoriya's hands, holding it up to Katsuki who was sitting in a cart.
"Do you like this one~?"

Todoroki grinned mischievously at young Katsuki before holding out a baby outfit like Midoriya's hero costume.
"Let's get this one instead."
(Y/N) giggles while Midoriya took the outfit and hung it back up.
"As much as I would love to do that, he would kill me if I let you get that for him."

After they got everything they would need, the group walked back to school and entered the classroom.
"Aww! He does look cute!"
Ochako said once her eyes fell upon baby Katsuki in his new outfit. The class turned at the mention of cuteness. A long 'Aww' left their lips seeing the baby. A pit made its way onto Katsuki's face from all the attention.
"That's too cute."
(Y/N) said in awe before the bell signaling the end of the day rang.
"We must've been gone longer than expected. Anyways, I'll take care of Katsuki. Bye guys!"

The class aid their goodbyes before (Y/N) started walking on the sidewalk, off of school grounds.
"Hey, mom? Is it okay if I stay at Katsuki'a house tonight? There was a whole quirk thingy today that changed him into a baby and I'm not sure if Mitsuki can handle all that on her own a second time. (...) Okay! I'll be home right when I wake up tomorrow, thanks mom, love you."
(Y/N) put her phone in her skirt pocket.
"You hear that Katsuki? I'm staying with you!"
Katsuki smiled, understanding a little bit of what was going on.

A smile found its way onto (Y/N)'s face as she approached the front door of Katsuki's house.
"Mitsuki! Masaru! I hope you two don't mind but I let myself in! Katsuki's tired so I wanted to get him to bed."
Masaru came down stairs, most likely from cleaning up Katsuki's messy room for his son's lover.
"That's okay. You can head on up, don't be scared to ask for anything."
(Y/N) smiled at the sweetness of her boyfriend's father. When she first met the guy, she was completely shocked. This calm, collected dude lived in a house with basically two yelling machines.
"I will, thank you."

(Y/N) opened the door to Katsuki's room. She walked inside, dropping her bag by the door. Slipping her shoes off, (Y/N) made her way over to Katsuki's bed.
"You tired little buddy?"
Katsuki rubbed his eyes, muttering an almost inaudible yes. Gently lying Katsuki on the bed, (Y/N) dropped herself next to him where the two were face to face. Katsuki's tired eyes looked into (Y/N)'s own orbs that were slowly getting tired themselves. (Y/N) wrapped her arms around the small figure, pulling him closer to her chest.
"Get some rest, Katsuki."
Within seconds, Katsuki was sleeping soundly. A soft smile was planted on (Y/N)'s face before falling asleep herself.

Not even 5 minutes into their sleep, the door to Katsuki's bedroom opened and in came his two parents. Mitsuki had a phone in her hand, leaning over the pair to snap a picture. She showed it to Masaru who smiled.
"Let's get out before they wake up."
Mitsuki nodded in agreement, the two tiptoeing back out, shutting the door quietly behind them.

'Extended Ending'

Katsuki's eyes slowly opened, coming face to face with (Y/N)'s covered chest. He jolted in place, confused. He looked around seeing as he was in his room. Apparently the quirk would just wear off over time. Katsuki looked up at his sleeping girlfriend's face, noting the arms wrapped around his head and neck loosely. He shrugged before wrapping his own arms around her waist and burying his head in her chest, falling back to sleep.