Sugiura, a middle-aged man who was unmarried until he was 40 years old. He lived alone in a detached house, but now he lives with two women who have no blood connection, his wife and daughter-in-law, and his daily sexual desire grows. Sugiura has a special habit of being obsessed with anal, but the woman who became a wife refuses anal SEX, so she was dissatisfied with the couple's activities. One day….