Sugiura, a middle-aged man who was unmarried until he turned 40. He used to live alone in a detached house, but when he ends up living with his wife and daughter-in-law, two women who are not related by blood, his daily libido just keeps growing. Sugiura has a special propensity to obsess over anal, but the woman who became his wife refuses anal sex, so he was dissatisfied with the couple's work. One day….
