One day, Shinji Shinhoku, the leader of the Shinhoku group, suddenly died in an accident.After that, many of the gang members transferred to the hostile organization, Yaza Wakai.As a result, the Shinkita group was weakened, but at the request of the remaining members, his wife Saori succeeded Shinji as the leader of the group.However, he falls into the trap of the Yoza Wakai, and is faced with the biggest humiliation of his life: the first time in several decades, he is still wearing a sailor suit and is embarrassed by the shame.