On a sweltering summer day, my wife fell ill with a summer cold, leaving me overwhelmed with household duties. Just then, my elder sister-in-law Hana Haruna came over to help out of concern. Coincidentally, my other sister-in-law Rin Okae, who had been working overseas, returned temporarily, and the three of us gathered at my wife's family home. An unusual cohabitation began with the two sisters-in-law while my wife remained sick. Surrounded by their big tits—so much larger than my wife's—and to prevent spreading the illness, we ended up sleeping side by side in a row. Nights spent sandwiched between their large breasts led to unexpected new experiences.