The casts includes Ryoko Shintani, Asuka Okame, Emiri Kato and Mai Aizawa. As for the story, I have no idea on what it's about? Seriously I'm no fan of Moe and any other things attributed to it but do know some hyped titles in the anime which is really good in the aspects of story and not just about some "cute" stuff which Type B Otakus like.
On a side note, Takeo Takahashi who directed Spice and Wolf and Mayo Chiki will also be in charge of the anime. This also puts Kazuya Kuroda on the line who also worked as character designer of Spice and Wolf. For those who've known the game I guess they can leave some feedbacks in the comment section so we'll know how good this one is.