A cheerful delinquent seeks fighting advice from his reformed-troublemaker teacher in this unconventional coming-of-age BL love story! Haruka and Narumi-sensei's dynamic explores what it means to be a leader and a role model amidst the social and emotional turbulence of adolescence.

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!!