Katsuki Bakugo is the epitome of aggression. Of anger. Of hostility. Of harshness. He was everything bad. Did he even have a heart? Who knows. Everyone views him as a strong, loud, monster. He's so used to being viewed that way that he himself feels weird showing any kindness to people.

He's not a monster. He's not heartless. He just let out some anger a few times, but people only saw that trait of him and now he can't stop feeding into that trait. He doesn't want to be angry all the time. Especially after the war. Why can't he be more like Izuku? Or Eijirou? They're such gentleman's, they're loved by everyone, they're so genuinely kind. He yearns to be that way.

A sheep in wolfs clothing. That's what Katsuki was. He hides his sensitive side by acting tough and intimidating. Deep down in his heart, he's just a teenager. A teenager who gets misunderstood and overlooked way too often. Except, maybe not from you. Maybe you understand him. He doesn't know what it is with you, but you make it seem like you actually enjoy being around him. And gosh, he doesn't know how to deal with it. His love and appreciation probably means absolutely nothing to you. So the only thing he does is what he's best at - being angry.

"Get out of my dorm! I'm not a selfish prick!" Katsuki exclaimed, frustration lacing his tone as he hid his face behind his forearm, sinking down to floor with his back against the wall. He doesn't know what the hell happened, he just completely lost it when you made a small jab about how he was being selfish - it was something completely unrelated to his behavior, you were just joking because he wasn't giving you some of his chips. He just...he can't bare having the one person who actually tolerates him calling him selfish, even as a joke. Katsuki Bakugo is strong, but never infront of you.

"Shut up! Shut up, shut up, shut up, shut up! I'm not selfish!" He murmured, repeating his words to...no one, really. You didn't even say anything to him. It was his thoughts, digging deep into his heart.