Two G-cup classmates are studying at my house! Something sexy happens every time I take a break!

My childhood friend Yuri has been friends for 10 years and is often hanging out at my house, making jokes, and they are like male friends. Recently, Yuri's best friend, Uno-chan, has also started to come and visit. Uno-chan was very popular with boys in her class, and she felt a sense of superiority or pleasure. Gradually after school, my house had become a hangout for the two of us... One day, my parents and I went on a trip and decided to go to a study camp at my house, including Uno-chan. I thought the three of us would spend time studying together, dangling normally under one roof. As my studies have subsided, I get into bed, "Have you both had sex?" Suddenly, a subtle atmosphere flows through a word from Uno-chan. From there the gears started to go wrong... "I've got a senior who's two years older than me," "Why don't you try studying sex?" "What are you doing??" "Are you doing, studying sex?" "It's unfair, I'll mix it up too." "You really like your boobs," "Hey, which one does it feel better?" Before I knew it, I was devouring her white, shiny, big breasts every time I took a break and had a vigorous threesome like a monkey during the breeding season.