While her mother-in-law was on a hot spring trip with friends, Yuko ended up taking care of her father-in-law. She tried her best to take care of him, but her father-in-law, who had been after Yuko's body for some time, sexually harassed her. Despite Yuko's confusion, the harassment escalated, and they eventually had a relationship. Feeling guilty towards her husband and mother-in-law, Yuko ended up becoming her father-in-law's toy.
