A frustrated married woman, Rei, summons the courage to invite her husband to work, but she refuses if it is not comfortable because it is not tight. Rei is shocked by her and starts training her vagina. But she happens to be seen by her father-in-law, who is a doctor. Rei is told that she can give accurate advice and consults with her, but an aphrodisiac is applied to her private area and she is fucked. The relationship with her father-in-law that started from that day. A married woman falls into an immoral relationship...
