Loving husband and peaceful life, Riko Mizushima worked as a tutor. Her new student, Hiro, lived with his father in a complex environment. On the day Hiro suddenly had to go to his grandmother's house, Ooki raped Riko. When Hiro returned to pick up something he forgot, he caught Ooki and Riko in the act. Riko, photographed by her husband and threatened, could not disobey orders. Betrayal of trust with Hiro, adultery against her husband, anal torture, humiliation, and unknown pleasures—Riko's daily life begins to unravel…
