Synopsis
Sono arrives at her new school only to meet three oddities. Three young men cosplaying as a samurai, a doctor and a penguin. These guys form the club BxB Brothers, a group that pretty much does whatever they want. Sono is given an invitation to join the group but she refuses due to her wanting to join other clubs. Katsumi (the samurai) also refuses her entry into the club but almost immediately after that, Sono finds herself caught in the club's activities (unwillingly). Katsumi finally agrees on Sono joining, admitting her into the BxB Brothers (without her approval).