Frustrated housewife Rei mustered up the courage to invite her husband to have sex, but he refused, saying that it was not tight enough and it did not feel good. Shocked, Rei started vaginal training. However, she was accidentally seen by her father-in-law, who is a doctor. She consulted him, who said he could give her accurate advice, but he applied an aphrodisiac to her private parts and made her have sex with him. From that day on, her relationship with her father-in-law began. The housewife became immersed in an immoral relationship...