Since getting married, Yua and her father-in-law have not been very close, he is extremely rude which makes her reluctant to interact with him. Today, he suddenly came to the couple's house. Due to a health check-up, he had to stay at their house for the night. The next morning, Yua's husband had to go on a business trip for three days, her father-in-law also went for a health check-up and returned, but shortly after, he came back again. Seeing Yua drinking alone, he invited her to drink with him. Intrigued by his knowledge of alcohol, Yua was continuously made to drink by him until she was so drunk that she lost consciousness. While her daughter-in-law was asleep, he secretly undressed Yua, touched her, smelled her, licked her entire body, took naked photos of her sucking his penis. Upon waking up, she saw her father-in-law putting his penis in her mouth, Yua tried to struggle but in vain, still drunk she had no strength at all, and had to endure his abuse. Surprisingly, the experience was not as bad as expected, his strong penis made her climax repeatedly. Her husband's recent lack of sexual activity always made her feel restless and uncomfortable, now being taken care of by her father-in-law allowed her to release all her desires. From then on, they secretly had sex throughout the three days her husband was away on a business trip, even when her husband returned, they continued to maintain this illicit relationship in secret...