Couple swapping NTR: Witnessing wife's affair with her friend through the bedroom window - Mito Kana JUY-914

My friends, a couple named Chanel, come over to visit on weekends. They said they'd move in sometime, but it seems they're moving next door next month. Looking at their house, which is even bigger than ours, they asked if I wanted to borrow their wives. I'd seen those "couple swapping" shows on TV, and at the time, I didn't imagine it would be such a nightmare...