A swapping enthusiast couple who applied to the manufacturer become the pranksters and approach ordinary couples who are staying at hot springs! They call the couples to a room with a hidden camera and start a party under the pretense of a room drinking party! The pranksters are a married couple, so they get the targets drunk and start talking about dirty things! They check their reaction from casual body touches and then suddenly get into a swapping situation! Wife? Maybe you were expecting something like this from the beginning? You were, weren't you?