A husband desperate to watch his beloved wife with another man invites his unsuspecting spouse on a trip with a couple secretly helping him. After bonding at the hot spring and over dinner, the accomplices suggest a king game whose orders quickly escalate. The other husband relentlessly gropes her breasts until she blushes and lets out lewd moans. Once alone with him, the wife finally exposes the desire she had been holding back and gives herself to the encounter.