Oto is a popular and serious female student at school. She serves as the discipline committee member, spending her days purely and uprightly with her boyfriend Sei, who is also a committee member. One day, she spotted Shou, a fellow student from the same school, on the street. Shou was a troublemaker known for causing violence in the classroom. Later, driven by a sense of justice, Oto went to Shou's house and found Shou and his older brother, the yakuza member Saiji Tatsu, living there. Before she knew it, Oto was pinned down and subsequently locked up in that house, becoming a victim of grim sexual acts…
