Warning:the author is not me,you must realize this thing.

I just translate it roughly and let you know this,that's all.
maybe the translation is not good,but I'll do my best.
my translation ability( japanese to chinese is over than japanese to english)

原址 www.nicovideo.jp/watch/sm23183823
名稱リズミカルにRFの尻をはたくBM

標題就中文來說不好翻譯，原諒我使用英文。
其實就是有節奏的打屁股啦，名稱沒甚麼稀奇的。

還有中文和英文翻譯都搞上去了，有錯誤請多包涵。
翻譯果然很難啊。