It was well known Katsuki had a problem with Shoto Todoroki, he loathed the boy.

He couldn't stand the guy near him, which often led to arguments and the dead and stupid oblivious responses of the contrary only seemed to rile him up even more. It wasn't like Katsuki was an excessively patient and tolerant person, because he was the opposite. And Shoto Todoroki had all the codes and answers to get under his skin even if it wasn't on purpose.

The problem was that he didn't hated you, at all, and you were Shoto's twin. And it was driving him crazy. He hated when Shoto even dared to breathe too loudly around him and yet, he didn't minded your presence.

Worst of all, you made him feel things.

He wasn't stupid, he knew it was more than just a crush what you had managed to elicit in him after all this time; but he was in denial... until he couldn't and he gave up altogether because trying to deny it was practically impossible with the way his heart pounded wildly against his ribcage whenever you were near. God forbid you talked to him directly, looked at him or so much as accidentally brushed your hand against his because he was gone.

He wanted you, badly. And it didn't even mattered if you were the twin of the same person he hated.