The hero comes to Shirosagi High School as a first, second, or third-year exchange student and on his first day sees a bully picking on a girl. When he tries to help, he is beaten and saved by a trio of girls from the school's Matoi-gumi club. They are all really good at martial arts and he decides to join their club with the intent of winning their hearts by saving people in trouble.

The hero comes to Shirosagi High School as a first, second, or third-year exchange student and on his first day sees a bully picking on a girl. When he tries to help, he is beaten and saved by a trio of girls from the school's Matoi-gumi club. They are all really good at martial arts and he decides to join their club with the intent of winning their hearts by saving people in trouble.