Swapping gurui: Yamanote wafuku fujin-hen

The Ohtani couple, Makiko and Shinji, are going through a rough patch in their marriage. Seeking excitement, they attend orgies with swap enthusiasts, and when they're alone, they have sex while watching swap videos. However, Makiko secretly feels disgusted by swapping, but Shinji, who is addicted to it, forces her to …