Four girls participate in prohibited underground fighting event"Girl's Blood" held at an abandoned school building in Roppongi every night. The girls have their own stories and quirks . Satsuki (Yuria Haga) suffers from a gender identity disorder, Chinatsu (Asami ta-da ) hurried away from an abusive husband, Miko (Ayame Misaki) is a S&amp.M queen and Mayu (Rina Koike) features a Lolita face.