I was the only one who thought that Riko was just a childhood friend. When I hit puberty and started to get interested in romance, she would get jealous whenever I was talking to a girl and would get in the way, dragging me around and making things difficult for me. "I'll let you practice with me as a childhood friend," she said, but she didn't listen to my opinion and secretly had sex with me in front of her friends and teachers! This is the first page of my youth, where I was constantly controlled in my ejaculation all over the school, every day, until I couldn't get an erection!