A couple who applied to a manufacturer as swapping enthusiasts become the masterminds, approaching a regular couple staying at a hot spring! They lure them into a room equipped with hidden cameras under the pretext of drinking in the room and start the party! The targets let their guard down because the masterminds are also a couple. They get them drunk and engage in frank erotic talk! While gauging reactions through casual body touches, they quickly steer things towards swapping! Wife? You weren't secretly hoping for this to happen all along? You were, weren't you?
