Sumire Takaoka is a happy office lady who has just married her kind co-worker. However, she is also in a secret relationship with her father-in-law, who is also his father and the president of her workplace. Even though she knows it's wrong, she gets wet when he comes on to her. She has a masochistic personality. Her large H-cup breasts are forcibly squeezed, and when he's not around, she takes her father-in-law's dick in her mouth for some passionate sex. Her father-in-law's aggressiveness and betrayal of him make her even more excited about sex, leading to her allowing him to cum inside her in an immoral incestuous encounter.