Shingo visits the home of his girlfriend of six months for the first time and receives a warm welcome from her mother, Kurea. Her gorgeous figure, beautiful face, and fitted business suit excite him so much that he can barely follow the conversation. Kurea is an insurance saleswoman, and as she asks whether he has thought about his future, she mixes suggestive body contact into her sales pitch. Her mature sex appeal leaves Shingo rock hard, and Kurea secretly gets him off without letting her daughter notice—the beginning of an arrangement that has him offering her his erection again and again behind his girlfriend’s back.