Haru, who was an honor student from a young age, had a sexual habit of going to school or around town without underwear. She goes to the house of her middle-aged neighbor, Kita, and exposes herself and masturbates without being noticed. Kita's younger brother, Ippei, sees her and threatens to tell their parents, so she gives in to his orders. Ippei and Kita gang-bang her, teaching pleasure to her innocent body. Before long, Haru grows into a true pervert. She begs to be creampied and clings to his cock...Haru continues to seek more pleasure...