Yuki Nee-Chan no Kan-Nou GokkoYuki Nee-chan no Kan-nou Gokko.; ゆき姉ちゃんの官能ごっこ。; Older Sister Yuki is a Sensual Girl; The Sensual Girl - Yuki Onee-chan; 유키 누나의 관능 놀이; Yuki nunaui gwanneung nol-i; 雪姐的官能游戏; Xuě jiě de guānnéng yóuxì

First year Highschool boy Shin Yuki stumbles one day upon his naked childhood friend reenacting a sensual novel with an mannequin in an empty classroom. Yukino Kurose, a third year student, loved to reeanact stories with Yuki’s help from books when she was a child, to discover how the characters in the story felt. This time she got herself a sensual novel and asks Yuki to help her out with her reenactment again. Otherwise she’ll have to find someone else, because mannequins are not enough. After a quick deliberation Yuki decided to help her out, because he doesn’t want anyone else to see her naked.