This year, her son will be taking the university entrance exam. Even after many years of marriage, her husband, Kenzo, has a strong love and sexual desire for his wife, Kyoko, and doesn't care if their son is right in front of him. During meals, he caresses her thighs and even asks for a kiss... Kyoko refuses as a good mother, but after her son goes to bed, she shows her female side by having an intense sex session with Kenzo. Wanting to enjoy more perverted acts with Kyoko, Kenzo chooses a day when his son is out and invites a young stranger into his home...