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

Waka and Miyu, best friends since their student days, still maintain close friendships with their spouses. However, Waka was struggling with fertility issues and growing increasingly dissatisfied with her sex life. Then, Miyu suggested an "AI compatibility test," which led the four of them to jokingly try "wife swapping." It was only supposed to be a simple camera-based observation of each other, but things took a turn when Waka was assaulted by Miyu's husband...