[A boyish girl who is becoming a woman!] Hayami and I are best friends, but she dresses and acts like a boy, so I have never seen her as a girl. One day, when I rubbed Hayami's bulging breasts while she was getting changed in the locker room, she reacted erotically... I got excited and crossed the line. Since then, she has been in heat and has been doing erotic things at school and on the train. Hayami becomes more erotic and cute with every kiss and thrust into her uterus. We instinctively shook our hips like crazy, becoming male and female and climaxing over and over again.