团地妻：锁定卧室 (1979)

A woman who lived an ordinary life as a housewife in a housing complex in the suburbs. One day, a yakuza comes to her to pay off her late mother's debt. Indeed, it was written in her mother's handwriting that her daughter would repay the debt if something were to happen. Confused, the housewife can't even tell her husband about the debt, and begins prostitution at the yakuza's command... Will she return to her normal life? The 21st work in the long-running Nikkatsu "Apartment Wife" series.