Ever since her husband left for work, she has been deeply frustrated. Even though she indulges in her daily masturbation routine, her loneliness only grows. Kayo's sighs grow louder with each passing day. Her son Daisuke is Kokoro by Kayo's state and ponders if there is anything he can do for her. One day, he witnesses Kayo masturbating. Seeing this alluring scene, Daisuke decides to comfort Kayo with his body, a forbidden act of filial piety.