In this world, there are only men and women. A father who loves licking and a frustrated wife, Rieko Hiraoka.

After her mother-in-law passed away, Rieko decided to live with her father-in-law. She decided to take a little revenge on her father-in-law, who has been staring at her like he was licking her eyes lately. She wears revealing clothes and does housework to show off to her father-in-law. Rieko was secretly excited when she saw her father-in-law being confused. One day, when Rieko saw that her father-in-law was going out, she started masturbating using his father-in-law's manuscript. Unfortunately, her father-in-law saw her. She goes to her father-in-law who is hiding in his room and tells him to keep it a secret, but Rieko asks for it and ends up having an affair with her father-in-law. A few days later. Her father-in-law treated Rieko as if nothing had happened.