As an adolescent, Hikaru finds himself following his mother as a member of the opposite sex. When school finishes early and he returns home to surprise his mother, he finds her masturbating alone. Seeing her breasts and vagina, he recognizes her as a member of the opposite sex, and gets an erection every time he thinks of her. One day, Mary and his father get into an argument over Hikaru's education, and Hikaru's father hits Mary. Mary tries to hold back tears in front of her son, but seeing this, Hikaru confesses his feelings to his mother.