童貞の僕にはずっと好きな人がいた。ずっとキスがしたくてたまらなかった。そんな中、旦那と喧嘩をしている姉が帰ってきた。「キスのやり方教えてよ」不意をつかれた姉だが、弟の押しに負けキスの練習を付き合うことに…次第に欲情した弟は勃起が抑えられず、初SEXを姉と生でしてしまう…
As a virgin, I always had someone I liked. I’ve been dying to kiss you. Meanwhile, the older sister who was arguing with her husband came home. “Tell me how to kiss.” My sister was caught off guard, but she lost to her brother’s push and decided to practice kissing. I’m alive…

– JavGG.net