In their shared apartment complex, the married couples of Natsukawa and Kanda have made it a tradition to go camping once a month. It was also customary for them to vent about each other's spouses while there. One day after a minor argument, Mr. Kanda stormed out of his tent and announced he would be going home. Feeling sorry for Mrs. Kanda, Mrs. Natsukawa suggested they switch partners temporarily to cool off. However, this innocent swap leads to unexpected consequences...