Takumi, a predatory man with a history of sexual assault, secures a substitute teaching position at a college through the help of his obsessed partner, Professor Azuma. Using a fake resume and the guise of "private lessons," Takumi begins manipulating and assaulting students, recording the encounters for his own pleasure. However, his dark secret is threatened when a student's concerned sister catches him in the act.
Professor Mikami uses blackmail to coerce the basketball captain, Mao, and her sister, Minori, into sexual acts, all while being filmed by his accomplice, Saki. Although Saki appears devoted to the professor, she harbors a secret agenda. On the day of Mikami's wedding to Professor Shiraishi, Saki exposes his crimes by playing the incriminating footage for all the guests, ruining his reputation and marriage to ensure he has no one left but her.