Since his parents were not in Japan due to an overseas assignment, Haruma, a young student, was left with relatives in the countryside during the summer vacation. There, for the first time in many years, he reunites with his childhood friend's older sister, Kaworu, who is his first love. Kaworu has now become a completely adult woman. - Seduce Haruma with her boobs wet with hot summer sweat and a glossy gaze. One day, he suddenly said, "If you're a virgin, I'll take it away." During the summer vacation in the countryside without any friends, I was covered in sweat and devoured with the H-cup busty sister next door.