Sayo's husband goes on an overseas business trip tomorrow with his secretary. At night, the mature couple have nettlesome sex. The next day, Sayo goes to take care of her son-in-law. The son-in-law, who was watching, gets an erection and gets sucked off by Sayo. The next morning, Sayo raids her son-in-law and has sex with him. Look out for Sayo Makino, who has a slender, bewitching body and a mass of unfathomable pheromones, and is in sexual heat!