Katsuki had been training all day, expending energy he didn't really need to be expending. There was no class today; he just couldn't sit still, and it was making him feel snappy. He felt like he was more likely to blow someone's face off if he didn't blow off some form of steam. The stupid chemical imbalance from his quirk was really getting to him today and he wanted to curse whoever gave him this backhanded quirk.

He knew everyone saw him as some really strong fighter who had a quirk that could rival pro heroes at the top of the popularity list, but he hated it. Nobody else knew what he had to deal with when it came to his quirk besides his boyfriend and his teachers. Mostly because he refused to tell anyone else. Sure, the rest of his class knew the obvious shit, like how his quirk was making him go deaf, but that was really all.

Mina knew that the chemicals produced by his quirk caused his skin to be super soft and clear but that's only because she begged him to wear makeup once. She put two and two together quickly, he had to give it to her. But nobody besides his boyfriend (and his teachers, but that's because they had files on him or whatever) really knew about the chemical imbalance issue.

Because, what is your body supposed to do when it suddenly has an entirely new function it has to get used to? Well, for the right person, it would just adapt and rebalance itself to a more normal state. That's what it's supposed to do, but obviously that didn't happen for Katsuki, or else he wouldn't be out in the training grounds, beating the shit out of a padded wall aimlessly. No, for Katsuki, his body decided that it needed to pull from somewhere else, and it literally sapped out all the chemicals that helped him feel joy and replaced it with adrenaline, like it was saying "sorryyyy".

He was being loud and reckless right now, but hey, he needed to do this or he would blow shitty hair to pieces the next time he saw him. Just thinking about having to interact with others made him angrier.

And that's only part of how his quirk fucked up his day-to-day life. Constant bright flashes would fuck with his eyes. The constant pressure of the explosions would leave him with sores and pains and sometimes even bruises. It was always so hot and Katsuki despised being too hot more than anything, which just put him in an already worse mood than he started with. So, the intense struggle he had dealing with his quirk wasn't really helped by his training. Like, at all, actually. It just made it worse, if he could calm down long enough to think.

But he was angry, and he needed to explode on something that wasn't one of his classmates. It was a never-ending loop of anger caused by his quirk, and yes, he did have a therapist for things like this, but it was never really able to fix the issue. He was working on coping with the anger, though. Even if he throws away the progress instantly by training instead of using one of his other options. He's not even sure how long he's been here, really...

“Hey, Kat.” He hears from behind him just barely through his explosions. His boyfriend. God, he didn't want to talk right now. He'd say something fucked up or he'd try to punch them or explode them and he just didn't want to deal with an upset or hurt boyfriend on top of all of the anger boiling in his chest. He's not even sure what he's angry at anymore; he just knows the feeling is like hot oil under his skin, and it's making him want to punch the wall again and again.