As a young girl, Ichika couldn't keep up with her classmates' lewd conversations and was secretly troubled. One day, she mustered the courage to visit her homeroom teacher's house on a day off to learn about sex. However, that teacher was a purebred pervert who went to brothels every week. Initially, he tried to get rid of Ichika, who had come to his house to go to the brothel, but he changed his mind and took advantage of her curiosity to molest her developing body. The girl, taking his words at face value, began to be controlled by him...
