Yuko has to take care of her father-in-law while her mother-in-law goes on a hot spring trip with her friend. She worked hard to care for her, but she was sexually harassed by her father-in-law, who had been aiming for Yuko's body for a long time. Sexual harassment becomes extreme regardless of Yuko who is confused and has a relationship with her behavior. Feeling her guilt towards her husband and her mother-in-law, she ends up becoming her father-in-law's toy.
