On a midsummer day when the heat continued, my wife was in bed with a summer cold and my kind sister-in-law, who was in trouble, came to help me with the housework. Furthermore, due to coincidences, Rin-in-law's sister-in-law, who works overseas, came back to Japan temporarily. Then, a bizarre cohabitation began at her wife's parents' house with two sisters-in-law who have big breasts that are incomparably larger than their small-breasted wives. My two sisters-in-law and I had to sleep in the river because I was going to catch a cold, but I couldn't sleep because my breasts were stuck to my left and right...
