Chihiro, married into a traditional rural family, struggles under intense pressure from her father-in-law due to their inability to conceive a child. One day, worried about the lack of an heir, her father-in-law forcibly rapes her and creampie her. Afterward, he begins a series of repeated creampie training sessions under the guise of "discipline," targeting the times when her husband is away, all in pursuit of impregnating her. Through this process, Chihiro suffers profound emotional and physical trauma.