"Your mother is really beautiful," Masaru began to think of her mother as a woman at the words of her friend. One night, Masaru's mother, Miho, invites her husband to have sex, but she is refused and masturbates next to her husband due to her uncontrollable sexual desire. Masaru, who happened to wake up, peeked into the masturbation of the unsailed sail, and the feeling of seeing her mother as a woman grew. Masaru takes the opportunity of his father to disappear on a business trip and tells Miho over and over again about his feelings. Masaru, who was full of desire and feelings, exchanged bodies with Miho at a house where her father would soon return.