Luna, the mother of Emi (Kazuha Izumi), who had married happily, decided to live with her. The relationship with her kind-hearted son-in-law, Satoshi, was also good, and they were spending harmonious days. However, loneliness gradually turned into love for Satoshi… Even knowing he was her daughter's husband, she couldn't suppress the awareness of men and the throbbing of her body, only able to restrain the surging sex drive through masturbation. But while she was in such turmoil, Satoshi consulted her about his sexless marriage with Emi…
