Her husband has been away on a business trip, leaving her father-in-law behind for a long time. Momoha feels increasingly lonely and masturbates to soothe her sorrows, but her father-in-law sees her. The next day, her father-in-law attacks her, claiming to feel sympathy. At first Momo resists, but her body is filled with a strange sensation. She begins to desire her father-in-law's virility...