Des:I have a secret that I cant tell my wifes best friend Sumire and each others partners. We have been having an affair since the day we met in a bar. My wife is important, but this is a relationship of convenience that cannot be stopped. The relationship changes completely when they decide to take a couples trip to a hot spring with each other. I was skeptical when I heard Sumire say we should have sex during the trip, but Sumires husband had a high fever that day and the three of us decided to go on a two-day, one-night trip.