According to Dengeki Online, Ore no Imouto ga Konnani Kawaii Wake ga Nai.
was announced to be aired from April 2013. The production studio is A-1 Pictures
. Aniplex explained the reason for the studio change that AIC Build has been busy in producing other titles. Producer Kashiwagi Shinichiro said the staff of the first season have been gathered to A-1 Pictures for the second season.
Source: Dengeki Online