Be happy! The second season is finally announced : April 2013
>http://news.dengeki.com/elem/000/000/543/543581/Google translate :
>http://translate.google.com/translate?tl=fr&u=http%3A%2F%2Fnews.dengeki.com%2Felem%2F000%2F000%2F543%2F543581%2F
It's not AIC which will do the S2 but A-1 Picture. The same staff is still confirmed.