Takemichi Hanagaki repeatedly fails to stop Hinata Tachibana, his teenage love, from dying in the present despite his best time-jumping efforts. Takemichi, now an adult, struggles with loss and the consequences of the Tokyo Manji gang’s criminal empire, which is an unintentional result of his interference with time. The gang, which was originally led by the idealistic Manjirou “Mikey” Sano, has since been taken over by the evil Tetta Kisaki, and as a result, has given up on its earlier goal of optimism.
Despite his despair, Takemichi returns to the past to look into Black Dragon, a rival motorcycle gang whose deeds ultimately resulted in Hinata’s death. He meets a fellow gang member there named the teenage Hakkai Shiba, whose older brother Taiju brutally reigns over Black Dragon. Hakkai tries to leave Tokyo Manji as an act of remorse after Taiju viciously assaults Takemichi in a street brawl, but Takemichi must stop him in order to keep Hakkai from facing a bleak future.
Takemichi and Chifuyu Matsuno develop a deep friendship they both need as a result of a shared tragedy. Takemichi fights to secure a bright future for his loved ones by investigating the Black Dragon’s members’ destinies with Chifuyu by his side.
