Hiroshi Shinanogawa decides to become a "delinquent" after reading a manga, and transferred from a private school to Komae Kita Middle School, a public school. What awaits him is a life way harder than he had imagined. On his first day, Hiroshi was summoned by Tatsuya Iguchi, the leader of the delinquents and was beaten up. However, Hiroshi later became part of the gang and spends his days fighting with the delinquents from other schools.
