Husband and Wife Couple Swap NTR - Shocking Infidelity Caught Through the Window

Two couples living in the same apartment building have made it their monthly tradition to barbecue on the rooftop. It's also become their habit to vent about their husbands to each other over drinks. After a fight with her own husband, Ayumi is convinced by her friend Sayaka to try a temporary couple swap as a way to cool off and reconcile — but this arrangement leads to shocking infidelity.