My childhood friend, Yuri, has been with me for 10 years, and we often come to my house and joke around with each other like we're male friends. Recently, Yuuri's best friend Uno-chan has also started coming to visit. Uno-chan was very popular among the boys in her class, and she felt a sense of superiority, or rather, she was happy. Gradually, my home became a hangout spot for the two of us after school... One day, Yuuri's parents and I decided to go on a trip and decided to have a study camp at my house, including Uno-chan. I thought the three of us would just hang out and study together under the same roof. After studying for a while and getting into bed, Uno suddenly asks, ``Have you two ever had sex?'' There's a strange feeling in the air. From there, the gears started to go awry... "I'm with someone two years older than me." "Why don't you try studying sex?" "What are you doing?" "Studying sex with me too?" "Sneaky, mix it up too." "You really like boobs, don't you?" "Hey, which one feels better?" Before I knew it, every time I took a break, I was devouring the white, glossy big breasts and having a violent threesome like a breeding monkey.