A couple who are swapping enthusiasts are the ones who are behind the prank and approach a couple who are staying at a hot spring resort to pick up their target! The pranksters, who are a married couple and are not paying attention, call the target into a room with a hidden camera under the pretense of a drinking session! As they drink, they get drunk and start talking about dirty things! They check their reaction from casual body touches and then they move straight into swapping! It's just a man and a woman! Pussy and a dick! Once they get turned on, they can't stop!