The third installment of this popular series features exclusive Airi Kijima! Every night, Airi's crotch aches as she hears the intense moans and the passionate, animal-like mating of Airi against flesh. Her father-in-law may be old, but he has a strong libido and makes love to her stepmother every night. He's a viper-man who will stay active his whole life. In comparison, her husband is indifferent to sex. The frustrated wife's Kokoro gradually turns to her father-in-law. She wants to be held passionately like that. Unable to suppress her desire, she goes to her father-in-law on her dangerous day to be held by him...