this is genji takiya, the main character of this movie.
So Genji is a son of a yakuza boss,and he transferred as a senior to suzuran all-boy high school with a goal to conquer the school and become the leader. Note that suzuran is a weird school, they have no lessons and is filled with soon-to-be yakuza. Each class has their leader which is the strongest in the class, but there is no conqueror in the school. There is one person who is close to be the conqueror, named Serizawa Tamao, a third-year student.
So basically the story is about Genji who fights to be the conqueror of the school with helps from the others and some obstacles on his way. But i could promise you it's better than what you're imagining right now. It's fun to watch it especially if you like action comedy (the hard way, though) If you hate blood please just keep away from this movie. It contains a lot.
My favorite scene is when they dueled, Genji and Serizawa. It's insanely cool, and they're both equal so it's hard to pick which one you want to win. Anyway i like this scene because it seems real, not like some western movies where they fight but there are no blood or scars. NO fun at all.
Anyway i'm soooo gonna watch crows zero 2 and i will be waiting for crows zero 3!