Crows is a manga created by Takahashi Hiroshi along with Worst and QP. The series is set two years before the Worst series. The series was adopted into two episodes OVAs and two prequel films; CROWS ZERO and CROWS ZERO II.
Harumichi Bouya transfers to an all boys high school but not just any school, it is known as Crows High, a school for the deliquents, badass, notorius, most wanted, gangsters and rejects. He just wants to be the number one fighter in school, in doing so sets a chain of events that would change the entire town.