Yukari goes to a chiropractor and feels pleasure from Sato's erotic massage, eventually allowing him to penetrate her. When she gets home, she is still immersed in the afterglow of sex and masturbates. Wanting to experience that excitement again, she invites Sato over when her husband is out. Yukari then asks for Sato's technique and his cock. But then her husband, who was supposed to be away on a business trip, comes home...