A debt that her husband secretly borrowed from his friend Sayama. Chihiro is persuaded by her husband to work as a nurse at Sayama's hospital in exchange for paying off the debt. On her first day at work, Sayama had told Chihiro that she would be working in the urology department, but she turns away when she sees a man's genitalia that is not her husband's. Sayama scolds Chihiro for this unbecoming behavior for a nurse. Then, under the pretext of getting used to men's genitalia, Sayama says something unexpected...