Towa and Yamato are two individuals with contrasting characteristics. While Yamato is extroverted, boisterous, and frequently involved in physical altercations, Towa tends to be introverted, focused on studying, and often endures the consequences of Yamato's actions due to being mistaken for him by others. One day, while returning from school, Towa encounters Mitsuru, a new acquaintance who is also a delinquent, during an altercation with the school gang. Despite their initial confusion over Towa's identity, Mitsuru is able to distinguish between them.