The student holds a secret about the female teacher Shou's past indiscretion, making her obedient to his commands. At his order, she seduces and has sex with the janitor Adachi. During exams, he secretly torments her with a vibrator, and his demands escalate. Finally, she calls out Adachi and, though reluctant, succumbs to masochistic pleasure as she has sex in front of him.
