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Last checked: September 1, 2017
Oreimo (俺の妹がこんなに可愛いわけがない, Ore no Imōto ga Konna ni Kawaii Wake ga Nai, lit. "My Little Sister Can't Be This Cute") and also known as Ore no Imōto (俺の妹), is a Japanese light novel series written by Tsukasa Fushimi, with illustrations provided by Hiro Kanzaki. The series includes 12 novels released between August 2008 and June 2013. A manga adaptation drawn by Sakura Ikeda was serialized in ASCII Media Works' Dengeki G's Magazine. A 12-episode anime adaptation produced by AIC aired in Japan between October and December 2010. Four additional episodes, which offer a different ending to the broadcast series, were streamed monthly via the official website and other video streaming sites between February and May 2011, before being released on Blu-ray Disc and DVD in June and July 2011. A 13-episode second anime season produced by A-1 Pictures, titled Ore no Imōto ga Konna ni Kawaii Wake ga Nai., aired between April and June 2013. An additional three episodes were streamed online on August 18, 2013.
Kyosuke Kosaka, a normal 17-year-old high school student living in Chiba, has not gotten along with his younger sister Kirino in years. For longer than he can remember, Kirino has ignored his comings and goings and looked at him with spurning eyes. It seemed as if the relationship between Kyōsuke and his sister, now fourteen, would continue this way forever. One day however, Kyosuke finds a DVD case of a magical girl anime which had fallen in his house's entrance way. To Kyosuke's surprise, he finds a hidden eroge (an adult game) inside the case and he soon learns that both the DVD and the game belong to Kirino. That night, Kirino brings Kyosuke to her room and reveals herself to be 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.