Kisa is a big fan of erotic doujinshi for men. One day she borrowed a certain doujinshi from her friend, Ren. That particular doujinshi was an erotic one from one of her favorite circles which she had forgotten to buy.
As she reads the doujinshi she starts to masturbate and she starts to fantasize that she's the one being ravaged as the pleasure takes over...
Come on, you can't just speak such a thing into existence and not want to run with it!
Love the art, Kisa's an adorable little pervert.