Naito Shinjuku family, a hereditary organization that can inherit family heads only Washio's pedigree.Taiga Washio (Haruto Ochiai), the eldest son of the president, Taro Washio (Ozawa Hitoshi), is a primary school student, but is a day to receive training for succession in leader assistant Reiji Toki (Yoshiyuki Yamaguchi).Meanwhile, Gunji's brother, Kiyoharu Washio (Kazuyoshi Ozawa) who was thought to be dead assassinated Gunji. As a result, Shinjuku will return to the lawless zone. Again this was a strategy to let the leader Yuki Kanamaru (Masaya Kato) suggest Kiyoharu as the next president. With this, the Reiji faction, which Taiga as the next general president, and the faction that forces Kiyoharu as the next president and the Osaka Namba party's three-pronged dispute began.