A married woman begins living with her husband and her serious father-in-law. However, one day, she accidentally sees her father-in-law masturbating with her underwear... When her father-in-law notices, he gives her a sleeping pill... and her days of despair begin... Although she is reluctant to be subjected to her father-in-law's extremely perverted play, her masochistic nature blossoms... "It's all your fault, father-in-law... My pussy is tingling and I can't sleep... What are you going to do about it..." The married woman begins to ask for it herself...