Tired of his lackluster and repetitive existence, Hiroshi Shinanogawa, an exemplary student, decides to ditch his private school and enroll in Komae High School, a public institution, with a clear-cut objective in mind - to emulate the gangsters depicted in manga by transforming himself into a delinquent. When he attends his initial classes, Iguchi Tatsuya and his clique summon him, setting the stage for Hiroshi's initiation into the realm of hooligans.