Its from qeens blade, which is basically a series of "battle books" or something. Basically, a company makes queens blade books that are really just ecchi illustrations. An anime is in the works.
cloaknblade said: Also a manga, but it's pretty crappy. There's hardly any fanservice, the girls have wretched personalities, and there's so much damn talking.
Are you talking about Hide and Seek? Because if there's another one I'd like to know about it.