Ayaka Nakatomi is a current schoolgirl and undercover special investigator who has been fighting against corruption within her academy. One day, she infiltrates Shuten Academy, a school secretly involved in human trafficking, and successfully obtains evidence of the crimes. However, her identity is exposed. After a fierce battle with the school's massive gang leader, Ayaka is captured and put up for auction, where she is purchased by a buyer harboring deep grudges against her. Seeking revenge, the buyer torments Ayaka's body, subjecting her to intense training filled with humiliation and pleasure. In the end, Ayaka meets a tragic BAD END.