The Mukai couple are on their honeymoon after four years, while the Satsuki couple are on a trip together for the first time in five years. They had planned this trip long ago and stayed at a certain famous inn. However, they never expected anything... something unthinkable happened. Due to a mistake by the travel agency, the rooms were double-booked. The travel agency hastily arranged an alternative hotel, but it was a lodging with no meals or baths. There was no way the couples, who had been looking forward to their trip for so long, could accept this. As the tense atmosphere grew, the wives suggested that they all stay peacefully in the room...