Yoshihiko lives with his wife Haruka and her parents. As his work style became telework, he spent more time with his mother-in-law, Chisato, who had never been alone. Then, Yoshihiko is gradually drawn to Chisato's mature sex appeal! It's good that her wife and her father-in-law are not nearby, so he approaches Chisato and rubs her obscene big tits. Eventually, the act is also done on the family side, and the domestic affair becomes a quagmire. A son-in-law who is in estrus in Chisato's body, which is more ripe than a young bride, and Chisato also gets pleasure from sex with Ji Po, who is younger than her husband.
