Kyoko decided to let her nephew Tomohito, who lives in the countryside, live in her house. It was only a few days with my nephew who came to Tokyo for sightseeing, but Kyoko didn't care about such things and was working hard on an affair with liquor store Jiro. Tomohito, who has peeped into the situation, gradually develops obscene feelings toward Kyoko, and even begins to act abnormally. Kyoko, who is distrustful of Tomoto's actions, asks him about it, and he makes an unexpected proposal...