Haruka, a third-year student who won the guard duty and became the leader of the delinquent group in the school, is a laid-back and cheerful boy who likes fighting but has no interest in the position of leader. When he finds out that the new classical teacher, Narumi-sensei, was once a 'legendary leader' who never lost, he challenges him to a one-on-one fight— but the outcome is unexpected! The love-fight between a current delinquent and a former legendary delinquent teacher begins!!

Haruka, a third-year student who won the guard duty and became the leader of the delinquent group in the school, is a laid-back and cheerful boy who likes fighting but has no interest in the position of leader. When he finds out that the new classical teacher, Narumi-sensei, was once a 'legendary leader' who never lost, he challenges him to a one-on-one fight— but the outcome is unexpected! The love-fight between a current delinquent and a former legendary delinquent teacher begins!!