Aoi, a beautiful, cute, and popular girl, is my younger childhood friend. She always teases me about being a virgin. But finally, I got a girlfriend! When I told Aoi, she made an unexpected suggestion: "Have you ever kissed anyone? Shall I be your practice partner?" I was surprised by the suddenness of it, but desperate not to be disliked by my girlfriend, I accepted Aoi's offer. My first kiss, my first touch of a girl...