自由奔放な妹が兄に見られているのを知りつつ、男を連れ込みHな勉強にいそしむ、そして最後は…兄に夜這いをかける妹！両親が外泊中に大好きなお兄ちゃんとエッチしたいみつきは、あの手この手でお兄ちゃんを誘惑する！当然断る兄だったが、可愛い妹の過激な挑発の数々に理性を保つことはできるのだろうか！？
The free-spirited young woman, knowing that her step-brother is watching her, takes in a man and seduces him. Then finally she goes for her step-brother while their parents are out of town. Mitsuki wants to have sex in all kinds of ways! Naturally, the step-brother refuses, but will he be able to keep his reason after all the extreme provocations of his cute little step-sister!?
