Ore no Imouto ga Konnani Kawaii Wake ga Nai (My Little Sister Can't Be This Cute) is a story about Kyousuke and his younger sister Kirino. The relationship of this two siblings are not on good terms, however their cold relationship was finally broken from Kyousuke found out that Kirino is an Otaku of Adult games (Eroge) in secret.
Well I read the manga of it and it was nice, but the story seem to be fast and short. If the Anime going to be shown, I think it might finish at least 12 episode or just a OVA like Kiss x Sis. Anyhow the Brother and Sister relationship is not bad and kinda like it hehe.
here the trailer of it