Nônai sex: Rôjin to yokkyû fumanzuma

Mika is an ordinary housewife living with her husband, Masaki. Masaki is a busy salaryman, and Mika, dissatisfied with their lackluster sex life, satisfies her desires through masturbation. One morning, as Mika sees Masaki off at the door, Ikuzo—an elderly man living alone next door—strikes up a conversation.