During the scorching heat of midsummer, my wife was bedridden with a summer cold, and my kind sister-in-law Hana came to help me with the housework. In a further coincidence, my sister-in-law Rin, who works overseas, came back to Japan for a short visit. And so, I began living with my wife's parents in a strange cohabitation situation with my two sisters-in-law, whose breasts are incomparably larger than my wife's small breasts. To avoid catching a cold, I ended up sleeping with my two sisters-in-law in a row, and I couldn't sleep with their breasts pressed against me on both sides...