It's been five years since his mother passed away. A father who raised his son alone decides to call in a tutor for his son who is depressed after failing his entrance exams. The tutor who turns out to be Maki, the wife of a colleague and a highly educated and intelligent woman, arrives. Maki and his son immediately begin studying, but... the tutor turns out to be an incredibly erotic and slutty teacher! The son, who is fascinated by the seductive charm of the adult woman, is now completely captivated by the married woman.