Stars Makino Yui, which is great. Also has Noto Mamiko and Saitou Momoko, which is also great. But the seiyuu I am most looking forward to hearing is Aizawa Michiru, the middle-schooler who played Furoe in Simoun. No-one but me liked that character, partly because of her harsh voice, but I am looking forward to hearing the young lady in another role -- that of Suzu.
Looks as if eyepatches are the moe accoutrement of choice these days: Chihiro in ef, as well as Perrier (Saitou Momoko) here.
The
official site, slow Flash as it is, has an interesting feature on the characters page: 360-degree VR of each main character. The site says that sometime in the near future, an increase in solar wind activity leads to skin cancer and other problems on Earth. At the same time, a new kind of human called "adapters" (all moe girls for some reason) are born. The site emphasizes the total use of 3DCG and talks about the beginning of a new era in animation.