When high-school student Yuki (Kengo Kora, Solanin) is rescued from some street toughs on a train by Kabu (Hayato Ichihara, Rookies), they realise that they were childhood friends prior to Yuki moving away. Reunited, Kabu convinces Yuki to join the high school boxing club, and eventually compete in regional tournaments. The most feared boxer in their weight division is Inamura (professional boxer Suwa Masashi), and it is only a matter of time before one (or both) of them must face him.