This summer, Yusuke decided to go back to his hometown after a long time. His two older brothers and their two sisters-in-law also returned during this time. Both of their wives had large breasts and shared similar interests, and even their names were quite similar, Yuri and Yuria. They carefree exposed their sensitive parts in front of Yusuke, sometimes due to sweat, and sometimes just after a shower. Since he didn't have a girlfriend, Yusuke couldn't resist the allure of the two sisters, and by evening, he sneaked into Yuri's bedroom, but Yuri was aware of this...