The story follows two married couples who have been close friends since their student days: , and Akana and Reiji Suzukawa . During a joint vacation at a hot spring (onsen) resort, the group enters into a "marriage exchange" for a single night.
The story follows two married couples who have been close friends since their student days: , and Akana and Reiji Suzukawa . During a joint vacation at a hot spring (onsen) resort, the group enters into a "marriage exchange" for a single night.
