Requested by -  

Toddler Izuku A.U

 Out of all the days. It was a Monday, and everyone was in class. Mr. Aizawa wasn't there when he usually was and neither was Izuku. This stirred up conversations and theories everyone had. When Midnight walked in everyone started asking questions. Katsuki didn't care though. He patiently waited for everyone to shut the hell up, which was actually pretty hard. "Everyone quiet down! We just have a little situation. There is a villain praying on kids and adults and they are using their quirk to make them a kid again," Midnight explains and everyone listens up. Katsuki started to think: No... Deku isn't here. Mr Aizawa isn't here. She comes in here explaining a dumb quirk - aw, fuck!

     Mr. Aizawa walks in with a small toddler. He looked exactly like Izuku. Everyone stared and their jaws dropped. Izuku got caught up in the fight because he and Mr. Aizawa were actually doing some assigned private training lessons. Everyone yelled Midoriya as they started asking questions and getting loud once again. Katsuki groaned loudly telling everyone to shut up. Izuku looked around scarred. He still had his mind but his body was different. He was smaller, everyone was bigger and he was surprised to find that it scared him a little. Everyone scared him a little. Izuku held onto Mr. Aizawa's hand tightly and of course Aizawa noticed.

     Mr. Aizawa used his quirk even though there was no need but it certainly shut everyone the hell up. "Everyone will continue their day but Midoriya will probably need help to do things. Don't start barging in on him with conversations because he obviously can't do what he used to when he was older. He still remembers everything but if he needs help help him, got it? Good, now I'm tired, get to work everyone. Midoriya you can still take you seat and try and pay attention but if it gets too hard just listen to everything the best you can," Mr Aizawa states and Izuku nods. "Oh, right one more thing!" everyone turns to Mr. Aizawa. "Midoriya's emotions will probably be affected as well so if anyone makes him cry I won't hesitate to punish all of you. Al Bakugo, I swear if I hear you hurt him I will personally think of a punishment for you."

     Everyone started laughing and Katsuki rolls his eyes. Izuku waddles to his seat. He was wearing red pants and red shoes. He was wearing a plain gray t-shirt as well and he carried one of his hero analysis books with him. Everyone watched Izuku waddle to his seat and they all watched in awe. He looked adorable as a little kid and his cheeks were even more cute. His eyes were big and gleeful. Izuku was nervous and he felt embarrassed. When he was hit hit hero suit was transformed with him so he would need a new one. But when he changed back he would come back naked so he would have to be careful from now on.

     Izuku hopped up on his seat and started listening making sure to get his notes down. Midnight was teaching the class and for some reason Izuku was really tired. He closed his eyes and he felt something lightly brush his face. Izuku opened his eyes and looked up only to see Katsuki staring at him. Izuku cowered down feeling much more inferior. He looked around and saw everyone leaving. "Get up nerd, we are going to our next class." Katsuki said and got up. Izuku started to get up off the chair but falls and feels an arm catch him. Izuku sucked in a breath thanking god that he didn't fall flat on his face, especially from the height he was at.

     The strong arms placed him down gently on the ground. It was Katsuki, again. "T-thanks Kacchan..." Izuku mumbled out and Katsuki made a 'tch' sound and walked out of the room. Iida and Uraraka walk up to him.

     "Hey, Deku! You look adorable!" Uraraka said crouching down to Izuku's level. Izuku blushed and thanked her shyly.

     "Midoriya! We will be doing intense training today, will you be okay just watching? If you need help with anything don't hesitate to tell me," Iida says happily and Izuku smiles.

     "Thank's Iida! But um... I don't want to be late for class and now that I'm short..." Izuku trails off and Iida and Uraraka look at each other thinking for a moment.

     "Iida, carry him!" Uraraka exclaims and Izuku's eyes widen and Iida thinks for a moment before agreeing with her.

     "This would be a great course of action. Let's go Midoriya, we don't want to be late for class!" Iida said as Izuku was placed on his shoulders and the three walk to their next class. Izuku was laughing the whole way there. "What's so funny, Midoriya?"

     "Nothing really! It's just that I've never seen things from this point of view in so long. And I've never seen things from up here so the ground looks really far away," Izuku says as they enter the next classroom. Everyone stares at them and some giggle while others find it cute. Izuku was set down and everyone sat down in a circle. They had no idea what they were doing but Izuku once again got really tired. He ended up falling to his side and his head landed on Katsuki's thigh. Katsuki freezes and slowly turns his gaze to Izuku and Katsuki grits his teeth sighing deeply.

     "AWW! LOOK, BAKUGO ISN'T KILLING HIM!" Kaminari exclaims and everyone turns their attention to the two. Katsuki wanted to kill Kaminari for saying that. Everyone started snapping pictures, even their teacher, Cementos. Katsuki flipped everyone off before yelling at them.

     "SHUT UP! Can't you see he's sleeping?!" Katsuki says and some students mouth drops. Katsuki was even surprised. He brings his fist to his mouth and squeezes his fist even tighter. Everyone started to take even more pictures and tease Katsuki. Katsuki felt Izuku shiver and he looked at him. "Dammit..." Katsuki whispers. He really wanted to hug Izuku to make him warmer but that would be bad for his reputation. Did he care? Yes a little, but he cared about Izuku more. Katsuki picked him up and brought him in his lap rubbing his arms making him warm. Izuku's eyes were a little opened.

     Everyone stared shocked and Katsuki sent them a deadly stare and everyone payed attention to class. When class was over Izuku looked up and blushed. Katsuki was looking down at him with his normal scowl and Izuku let out the cutest giggle that everyone whipped their heads around to look at the adorable baby looking toddler. Izuku brought is tiny arms up and cupped his hands while looking up at Katsuki.

     "Why are you mad, Kacchan?" Izuku asks with a playful pout and his puppy-dog-eyes. Katsuki had no words. He couldn't get enough of those green eyes. Normally he would be pissed but he wasn't. 

     "I'm not mad, shitty Deku. Get up, we're going to lunch."

     Katsuki gets up and gently pushes Izuku off of him. Everyone started bantering with him and Katsuki punched Kaminari. Izuku walked with Uraraka and Iida to lunch. Everyone sat down at the table but Izuku was too short to sit on the bench. He sat on the table, his little feet dangling and kicking back and forth. Monoma came over and scared everyone and Izuku almost fell off the table but Uraraka caught him with her quirk. Everyone looked at him and Izuku almost started crying. Yes, he is the type of guy to wear his heart on his sleeve, so he was emotional. But being this young he was more so.

     Soon everyone went to the training ground and Izuku was still upset but he put on a fake smile making sure everyone was okay. Why did he need to smile to make everyone else happy? Katsuki was dressed in his hero costume and Izuku was in stretchy fabric, a lot like M.T Ladies so when he transformed back to his original form he would still be in his clothing. Katsuki watched Izuku smile to his friends and once they turned around he saw Izuku instantly drop his smile. Katsuki's mouth opened a little in disbelief. Fucking Monoma... Katsuki thought was he walked with the class to training grounds.

     Everyone was sitting or training and Katsuki saw Izuku sitting alone looking down at the ground slowly kicking his legs. Katsuki got up and walked in front of Izuku. Izuku saw a pair of black boots approach him. He looked up and saw Katsuki staring at him. "Hey..." Katsuki says and Izuku tilts his head and smiles faintly.

     "Hey, Kacchan!" Izuku says. Why was he feeling so upset about getting teased by Monoma? It's not like he wasn't used to teasing all his life, and especially from Monoma. Katsuki sighed audibly and crouched in front of Izuku so he was at his level. 

     "What's wrong?" Katsuki suddenly asks.

     "N-nothing-"

     "Don't give me that bullshit! I know you are faking that smile of yours. This has to do with that copycat bitch right?" Katsuki asks and Izuku reverts his gaze and looks at the ground frowning. Katsuki understood that Izuku was more emotional in this toddler state. Even though he had the same mind as his original age, his body and emotions were reverted back to the state they used to be in. Of course he would be upset over something little like that. Katsuki out of everyone understood that, and surprisingly didn't judge him for it. 

     Katsuki sat down next to Izuku and started a conversation with him. "So, you can't use your quirk or something?" Katsuki asks while observing everyone.

     "If I use it my limbs will literally rip off of me." Izuku states and Katsuki's face contorts into one of displeasure.

     The two walk a little bit to the side but a big boulder hurdles towards them. Katsuki harshly pushes Izuku to the side and sends an explosion in front of him. Izuku falls to the ground and everyone rushes over. Some rush over to him while others were standing near the cloudy smoke. Izuku started crying and everyone looked at him. Katsuki walks over and Izuku looks up and sees him and he immediately hugs Katsuki's leg.

     Katsuki crouches down and Izuku flings his little body into Katsuki's chest. "Why are you crying nerd?" Katsuki asks as he gently hugs Izuku while everyone once again stares in awe.

     "I-I thought y-you got h-hurt! It was m-my fault-"

     "Shut up!" Katsuki cuts him off. "It wasn't your fault so don't go blaming yourself and shit. It was Kirishima's fault for breaking that rock." Katsuki says and Kirishima starts apologizing.

     "Why are you crying, Deku?" Uraraka asks sweetly.

     "You guys are dumb! Can't you see that his body changed which means everything else but his mind? He is more emotional as a baby, idiots! And that stupid Monoma hurt his feelings earlier so he feels bad!" Katsuki exclaims and everyone instantly understands. Some were mad at Monoma. Izuku buried his face in Katsuki loving the feeling of his old friend hugging him. Even if this would only happen once, he would take up all the time to enjoy this sentimental moment.

     Izuku had a slight crush on Katsuki so being this close to his hard chest made Izuku turn pink a little but no one would be able to tell because he was crying. Katsuki also liked Izuku so he promised himself he would start being nicer on this day. Funny how it turns our Izuku turned into a child the day he made a promise to himself to be nicer. The odds were in his favor. Katsuki wrapped his arms around Izuku and sat on the ground holding him. Katsuki looked at Izuku and everyone basically left them alone and went back to training. Some sneaking glances at them.

     Katsuki kissed Izuku's forehead and Izuku kissed Katsuki's nose sniffling. He was trying to calm him down and Mr. Aizawa watched and smiled a bit. "I saw that," Present Mic said in a normal not yelling voice. Mr. Aizawa immediately stopped smiling.

     "I have no idea what you are talking about"

     "Yes you do Shota!"