Chiharu recently started living with her husband's father. However, she is worried about living together because of her father-in-law's past relationships with women. Even in between housework, she feels his gaze on her chest and buttocks... Chiharu's suspicions grow more and more. One day, as Chiharu sees her husband off, her father-in-law stands in front of her and attacks her. She feels pleasure that she could not get with her husband. She becomes addicted to sex with her father-in-law...