My childhood friend, who attends a famous women's university, took pity on me for failing the university entrance exam seven times and became my private tutor. She is a relative and has a large butt. With her gentle cowgirl technique, she made my huge, pent-up penis explode multiple times, squeezing out my semen with her contracting vaginal folds. She is my tutor, Kyouka Tachibana, who helped me release my pent-up frustration through abstinence and sexual activities.