I finally got a girlfriend! And she's the school idol! But I'm still a virgin and I don't know how to have sex... At times like this, I turn to my childhood friend Yui, who I've been doing everything with since we were little, for advice! She makes a surprising suggestion: "Why don't you lose your virginity to me for now?" I don't want my girlfriend to know that I'm a virgin, and I don't know how to do it, so I'm going to practice sex with Yui! I finally realized something while having sex with Yui, who teaches me how to give a blowjob, cunnilingus, and even creampie.