MHA Age Regression Oneshots 💛

(ftm) Kami x Sero

A/N: Hello darlings, so sorry it's been so long!! I hope this one makes up for my absence. Enjoy!

TW: Transphobia, dysphoria

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Kaminari hadn't had the best day. Sure, he did well on his testing and training but something just felt off. He couldn't quite place it.

It was around six o'clock and he was in his dorm finishing off some homework he'd gotten from Aizawa that morning. Usually, he wouldn't work on homework the day it was given but he needed a distraction from the icky feelings he was having.

Thankfully, the homework was relatively easy so it didn't take him long to finish. Which, normally, would be great. That was often something that helped him feel good, more put together, and organized. But in this case, he'd lost his distraction and he needed to find something else to busy his mind with.

So he opened up his phone and started scrolling through his Twitter feed. All was going well until he stumbled upon a post talking about how transgenderism was wrong and disgusting. That's when he realized what he'd been feeling all day.

It explained the uncomfortable feeling in his chest when he felt his shirt was just slightly too tight. It explained the need to hunch his back, hiding himself from everyone else. And it explained the constant paranoia that everyone was staring at him.

He felt dysphoric. He felt like a girl.

...

It was about half-past seven now and Kaminari was still in his room except now he was wrapped up in his blankets, softly crying to himself. He wanted to call Sero to come over but he knew he was busy and he didn't want to interrupt him. So instead, he settled farther into his bed and let his emotions take over.

It was then that he started to feel himself slip. Regressing did help him feel a little better, it took his mind away from the harmful thoughts but the feelings of invalidation and sadness were still there.

Little Kaminari hadn't even thought twice about calling Sero, he was sad and he knew his daddy would take the icky feelings away. So he picked up his phone and clicked on Sero's contact.

The phone only rang once before Sero picked up. In all honesty, he knew Kaminari wasn't doing well but he didn't want to push so he waited until he reached out to him.

" Hey, baby," Sero said, growing slightly more concerned when he heard little sniffles coming from the other end of the call.

" H-hi daddy," he replied. Sero's heart shattered into a million pieces when he heard how small and sad his baby sounded. Before he could think twice, he was already getting up to go to Kaminari's dorm.

" Are you crying, lovely? Can you tell daddy what's wrong, hm?" Kaminari stayed quiet, not trusting himself to speak without losing his somewhat composure. Instead, he sniffled and whined, trying to tell Sero he needed him without using his words.

Sero understood, having been in this situation before. He picked up his pace, making it to Kaminari's dorm in less than five minutes. He knocked on the door before he opened it himself (Kaminari always leaves it unlocked) and walked over to the bed.

He knelt down in front of the boy and gave him a warm, comforting smile. " Hi, baby boy, what's wrong? Let daddy help you feel all better," he whispered, reaching up to gently stroke the boy's hair.

Kaminari sniffled and took a deep breath, " Jus feel wike a girl," he mumbled. Of course, his caregiver couldn't understand what he'd said so he asked him to say it one more time, a little louder. Then Kaminari lost it, he felt too embarrassed to admit his feelings. His sobs got louder and his body began to shake.

Sero jumped at the increase in volume but remained calm because he knew if he panicked, his baby would react to that in a negative way. " Hey hey, it's alright, sweet boy. Can I hold you?" he asked. It was important to Sero that he asked for permission before touching Kaminari because he knew that, in some situations, it made him extremely uncomfortable to be touched without warning (consent is key, my dudes).

The little nodded his head, sitting up and holding out his arms toward his caregiver. Sero immediately took hold of him and placed him in his lap, Kaminari latching onto him and holding him like a lifeline.

...

The two stayed like this for a while, Sero rocking his baby from side to side to calm him. Once Kaminari was settled enough, the caregiver decided to ask a few more questions, trying to get to the root of the problem.

" Are you feeling a little better, sugar?" he asked. He decided it was best to take the questions slowly, doing his best not to overwhelm the boy any more than he already was.

Kaminari nodded, wiping his eyes. His head was resting on Sero's shoulder, his cheek pressed firmly against it. " Good, I'm glad. Do you wanna tell me what's wrong now, baby? You don't have to if you don't want to but it would really help daddy to know so he can help fix it."

The blond was silent for a moment or two, working up the courage to speak. " I jus feel wike a girl, daddy. I don' wike it." he said, finally. Sero was relieved to finally know what was going on with his partner. This was a problem he knew how to fix.

" Oh, darling, but you're not a girl. You're daddy's very very handsome little prince. I'm sorry you're feeling that way, how can I help you feel better?" Kaminari shrugged, the affirmations made him smile but he still felt sad and he didn't know what to do.

Sero kissed his forehead looking into his golden eyes. He gave him another soft smile, letting him know everything was alright. " It's ok to not know, baby boy. But I need to ask you a very important question and I need you to be honest with me, alright?" Kaminari nodded, having a good idea of what the question would be.

" Can you tell me how long you've been wearing your binder, lovely? I know you won't want to take it off but it's not good for you to keep it on for too long." the question was exactly what Kaminari expected. Expected and dreaded. He'd had it on for a very long time. Of course, he knew it was bad but he felt so wrong without it.

The blond looked down, not in shame, he just had to count the hours he'd had it on. " Um... been wike ten hours," he mumbled. He brought his hands up to fiddle with the strings on Sero's hoodie. He was so worried that his caregiver would be mad at him.

It didn't come as a surprise to Sero but he was definitely worried. But, again, he couldn't express his panic or Kaminari would react to it. So instead, he gently took one of Kaminari's hands in his own and used his other to press against the blond's cheek so he'd look up at him. " Ok, honey, let's take it off and let yourself rest, then. I pinky promise I'm not upset with you but I don't want you to get hurt so we have to take it off."

" But reawy don wanna takes it off. Gon wook wike a girl!" Kaminari whined. He knew it was dangerous to keep it on for so long but he really didn't feel like he could take it off. He didn't want to be able to feel his chest.

Sero wiped the fresh tears falling from Kaminari's eyes and kissed his nose. " You won't look like a girl, my prince. You'll still be the prettiest and the most handsome boy in the whole world. You'll still be my cute little baby boy, ok?" Kaminari nodded, too tired to put up a fight.

...

After Sero helped Kaminari out of his binder and into one of his caregiver's t-shirts, they decided to play a couple of games to keep the little's mind away from the bad thoughts.

First, they colored pictures of their favorite things. Then, they played with Kaminari's favorite stuffies, including but not limited to Pikachu and Toothless. Then they finished the night off with a rescue mission. Kaminari being Sero's knight in shining armor and saving him from the big scary dragon that tried to eat him.

By the end of the night, Kaminari was all tuckered out and ready for bed. They had played for a long while and it was way past his bedtime. Plus, all that crying really took it out of him. So they decided to relax and cuddle on the bed, letting a movie quietly play in the background. Kaminari was already asleep by the time he got settled into Sero's arms.

The caregiver wasn't quite asleep yet so before he drifted off himself, he leaned over and kissed his baby's cheek, whispering a quiet I love you, my prince in his ear. Just a moment later, he laid his head down on his pillow and fell peacefully to sleep. 💛