Now here's the fun bit: it's an anime.
Thing is, the name "Roukyuubu" (ロウきゅーぶ!) is both a seiyuu unit and upcoming anime. Kinda weird, right?
Interested? I most certainly am (ﾉゝ∀･)
Their program titled "Spring Party is HERE!" will cover the 4 lovely ladies, Tomatsu Haruka, Kotobuki Minako, Takagaki Ayahi and Toyosaki Aki.
Just what the program will be about is a mystery, with further details to be revealed at a later date.
But you can keep yourself updated here at their official website.
And here's Kotobuki Minako in a nurse and secretary uniform.
I kinda like it, very much :3
Also, another K-ON! member is enjoying herself with some nekomimi つ（＾∀＾）つ