Suzu, a college student, is a tutor for her childhood friend, Urara. They were like real sisters to her. One day, Suzu's boyfriend, Philosophy, catches sight of Urara. Philosophy is a thug, and he half deceived the innocent Suzu to date him. In order to borrow money from her older brother, who has a sexual interest in female students, she schemes to offer her back... Before long, Suzu is also degraded as a plaything for her peers, and the curtain rises on the ring of sake pond hell.
