Rika, a wife, lives with her father-in-law at her husband's parents' house. Her father-in-law is still active in his late fifties, and is a physically demanding man who works hard as an interior craftsman at a construction site. Rika works Rika at the housework, but she secretly feels disgusted by her father-in-law's vulgar and rough way of speaking and his obvious sexual harassment gazes. "Don't say that, my father doesn't mean any harm," her husband laughs. But one day, late at night when everyone is asleep, her father-in-law suddenly starts groping and touching her in the kitchen...!