2011 anime ONAs

short for is a Japanese light novel series written by Tsukasa Fushimi, with illustrations provided by Hiro Kanzaki. The story depicts high school student Kyosuke Kosaka who discovers that his standoffish younger sister Kirino is actually an otaku with an extensive collection of moe anime and younger sister–themed eroge she has been collecting in secret. Kyosuke quickly becomes Kirino's confidant for her secret hobby.

Japanese anime television series

Japanese manga series

is a Japanese original net animation (ONA) series created by Izumi Todo and produced by Toei Animation in collaboration with Banpresto. The animation was released on Nico Nico Douga and YouTube in December 2011. Five additional episodes were streamed between August and December 2012. An anime television series aired between October and December 2013.

original video animation