A girl who wants to have sex with her boyfriend for the first time in a few days but doesn't want it to be seen as her first time, so she practices with a random older man for penetration. (Kitaoka Karin HMN-795)

Guolin is a modern girl, but she's actually inexperienced... Her friends and her recent boyfriend all think she's experienced. To avoid damaging her self-esteem (?), she decides to use a middle-aged man she met on social media as a practice partner. Because he's a casual guy, he shamelessly exposes himself... carefully observing his penis, making her open her vagina, letting her experience unprotected sex... Although it's supposed to be a rehearsal for her upcoming first time with her boyfriend... she gradually becomes captivated by the man's unprotected penis...