Chisato lost her beloved husband in a car accident two years ago. In the wake of her husband's death, her son Ryo's behavior becomes strange, and he begins to withdraw into his room without going to school. And start installing voyeur cameras all over the house ... son who masturbates alone in the room while monitoring mother's change of clothes and masturbation .... One day, Chisato has a physical relationship with his son's homeroom teacher. My son saw it...