ADN-778 Wife swapping: The one I have the best physical chemistry with is my best friend's husband.

Waka and Miyu, best friends since their student days, still maintain close relationships with each other as couples. However, Waka was struggling with fertility issues and growing increasingly dissatisfied with her sex life. Amidst this, Miyu brings up an "AI compatibility test," and the four of them jokingly decide to try 'wife swapping.' What was supposed to be just watching each other through a camera takes a turn when Waka is raped by Miyu's husband, revealing each of their hidden sexual fetishes and leading to a chaotic and wild escalation…