Crows Zero

Suzuran High School is also known as The School of Crows. The biggest clique, Serizawa Army and its boss Tamao Serizawa are challenged by a new student to the school, Genji Takiya. Takiya, son of a yakuza boss, wants to be the school's ace fighter. But at the advice of Ken Katagiri, a low-ranked start-out yakuza, Takiya starts to muster together a gang of his own. And as he grows into a true leader, he must face an ultimate battle with Serizawa's gang.
(Source: AsianWiki)
~~ Adapted from the manga series "Crows" (クローズ) by Takahashi Hiroshi (高橋ヒロシ). The film presents the story that precedes the original manga. The characters have also been newly re-created.