[SONE-269] Two G-cup classmates are having a study camp at my house! They do naughty things every time they take a break! Yuri Adachi Mirei Uno (Censored)

I've known my childhood friend Yuuri for 10 years, and we often hang out at my house, joking around with each other, like we're male friends. Recently, Yuuri's best friend Uno-chan has also started coming over to hang out. Uno-chan is very popular with the boys in class, and I feel a sense of superiority, or maybe even happiness. Gradually, my house became a hangout spot for the two of them after school... One day, my parents and Yuuri's parents went on a trip, and they decided to have a study camp at my house, including Uno-chan. I thought we'd spend the time studying together, chatting normally under the same roof. After a break from studying, when we got into bed, Uno-chan suddenly asked, "Have you two ever had sex?" and an awkward atmosphere ensued. From there, things started to go wrong... "I'm dating a senior who is two years older than me." "Do you want to study sex too?" "What are you doing?!" "Study sex with me?" "That's not fair, let me join in." "You really like boobs, don't you?" "Hey, which one feels better?" Before I knew it, we were devouring her shiny, white big breasts every time we had a break, and engaging in a fierce threesome like sies in mating season.