My Sister, My Writer
俺が好きなのは妹だけど妹じゃない (original)
Suzuka Nagami is a beautiful third-year middle school student who has excellent grades and is the student council president. She wrote a novel about a little sister who dotes on her older brother, and the novel wins a light novel award. After they discuss the matter, Yuu is the one who debuts as a proxy light novel author instead of Suzuka, under the pen name Chikai Towano.
Starring Yua Nagae, Reina Kondo, Yui Ogura, Chinatsu Akasaki, Tasuku Hatanaka, Ayumi Mano, Eri Kitamura, Kazusa Aranami, Yui Nakajima
It's a comedy and animation show, and has a rating of 4.2 out of 10 from Imdb which is fairly low for this kind of show.
Watch it here
Not found streaming from United Kingdom.