Wind Breaker 1 (manga)

Haruka Sakura wants nothing to do with weaklings—he's only interested in the strongest of the strong. He’s just started at Furin High School, a school of degenerates known only for their brawling strength—strength they use to protect their town from anyone who wishes it ill. But Haruka’s not interested in being a hero or being part of any sort of team—he just wants to fight his way to the top!