Waka and Miyu, who have been best friends since their school days, are still together as a married couple.However, Waka is having trouble getting pregnant and is gradually becoming dissatisfied with her sex life.Meanwhile, after Miyu brings up the ``AI compatibility test,'' the four of them decide to try a ``wife swap'' half as a joke.They were supposed to just watch each other's behavior through the camera, but when Waka is raped by Miyu's husband, their secret sexual tendencies are revealed and they go wild.
