My best friends Brother

Katsuki Bakugou has spent years pretending he can't stand Izuku Midoriya.
It should be easy. Izuku is just his older brother's best friend the guy who's always at their house, always stealing Kudo's attention, always smiling at Katsuki like he's still some annoying kid following them around. The guy who calls him cute in that careless, harmless way that makes Katsuki want to scream.
Because Katsuki doesn't want to be cute.
He doesn't want to be Kudo's little brother.
And he definitely doesn't want to keep wanting someone who was never supposed to look at him twice.
But the older Katsuki gets, the harder it becomes to ignore the tension building between them. Late nights, sharp words, accidental touches, and the kind of looks Izuku doesn't seem to realize he's giving start turning a stupid crush into something far more dangerous.
And if Izuku finally stops seeing Katsuki as just his best friend's younger brother, Katsuki knows one thing for sure:
there's no way either of them are walking away from it untouched.