The other version of episode 12, "True Route," will continue the story, which will end at episode 15.
All I can say is, what in the actual fuck did I just spend over 12 hours watching. WHAT THE FUCK
Continuation from my "Ore no Imouto ga Konna ni Kawaii Wake ga Nai" review. Based off memory. Also, spoilers. Mature language. True Incest: True Route. Indeed, the title is true. Uuh. Basically, episodes that should have been in the original anime, but weren't, probably because they were 4 minutes too long for TV. Animation is still okay. Still dislike the sound. The other characters are still alright.
short sweet review - i in fact liked these episodes, i felt like it gave the anime a much needed ending, or simply "better ending" if you will... a department which the anime left very un-satisfying... at first i had a hard time watching these because i saw it as "the sad-ending" but nope, its still light hearted and happy for everyone. adds also much needed character development for black cat *if you are truly not interested in the black cats story but want to know more about kirino then i don't think it would do any harm to simply watch the first ep and the last ep... but all in all; its only four episodes so you might as well just watch it all*