Bijin katei kyôshi: Musaboru uchimata [美人家庭教師　むさぼる内股]

A female college student, Aoi, is having an affair with her professor, Ogata. One day, Ogata asks her to be a tutor for his son, Yu. Yu lives alone in his parents' house in the countryside, and he has been refusing to go to school and dropped out of high school. Aoi agrees, but she can't hide her anxiety. Aoi immediately visits Yu's house, but Yu's attitude is cold...