Reiko Mizushima, who lives a peaceful life with her gentle husband, was a part-time tutor. Her new student Hiroshi was in a complicated environment living with his father. On the day when Hiroshi suddenly decided to go to her grandmother's house, Oki violated Reiko. Hiroshi, who returned to pick up the forgotten item, peeks at Oki and Reiko's foolery. Reiko, who is threatened by her father taking a picture of her, can no longer go against her orders. Betrayal of her trust with Hiroshi, immorality to her husband, anal torture, shame and unknown pleasure, Reiko's daily life goes crazy.
