During the summer Obon break, my brother and his wife returned to their hometown. The first time I met my sister-in-law Ema, she was young, beautiful, and had an amazing figure. Despite being well-endowed, she always wore unusually skimpy clothes, making her cleavage and even her nipples clearly visible... Unable to resist her provocative allure, I took advantage of her many times while hiding from my brother and parents! The secret of that summer, intertwined with our sweaty bodies...