Because his parents are overseas on assignment and not in Japan, the young student Haruma was left with relatives in the countryside during summer vacation. There, he reunites with Kaoru, his first love childhood friend, after many years. Kaoru is now a fully grown adult woman. She tempts Haruma with her breasts wet with the sweat of the hot summer and her seductive gaze. One day, she suddenly says, "If you're a virgin, I'll take it."... During a summer vacation in the countryside with no friends, I devoured the H-cup big-breasted older woman next door while covered in sweat.