I was alone with a classmate in the classroom after school. When I bent over, my breasts were visible through my uniform and gym clothes. Was it because I had small breasts? She was so defenseless that she was not wearing a bra or her bra was floating, so her pink nipples were completely visible! I was not immune to girls, so I got an instant erection! She seemed to be happy that I was excited by her small breasts, and she touched my dick, asking, "Do you want to see them? Are your breasts okay?"