I'm a university student in Tokyo. I took advantage of my summer vacation to return to the countryside in Kyushu for the first time in a while, and found my best friend Haruto's older sister, Hinano, there. As soon as she found out I had a girlfriend, she started to make fun of me, but then she said, "I'll teach you how to kiss, big sister..." and before I knew it, she'd stolen my first kiss... Hinano's tongue-kissing, which was even hotter than the summer heat, made my erection go crazy, and before I knew it, she had taken my virginity... We kissed and kissed over and over again in the middle of summer in the countryside... I completely forgot about my girlfriend in the city and had the best summer ever, sweating and fucking.