I had always loved my childhood friend, spending every day together. But I never had the courage to confess my feelings. Then one day, I found out she had started dating someone, leaving me shocked and heartbroken. Even though I fell for her first, she was still inexperienced and began asking me to help her practice sex. Gradually, her desire for me grew stronger than her relationship with her boyfriend. She removed the condom and made me creampie her repeatedly, calling it "practice." Through this process, our feelings for each other deepened.