The debt that her husband made from his friend Sayama secretly to Chihiro. Chihiro was persuaded by her husband to work as a nurse at a hospital in Sayama instead of repaying the debt. On the day of work... Chihiro had been told by Sayama in advance that she was in the urology department, but when she saw a male genitalia other than her husband's, she turned her face away. Chihiro is reprimanded by Sayama for such unbecoming behavior as a nurse. And under the guise of getting used to male genitals... Sayama said something unexpected...