Ore ga Suki nano wa Imōto dakedo Imōto ja nai

Ore ga Suki na no wa Imouto dakedo Imouto ja Nai
俺が好きなのは妹だけど妹じゃない

Adaptation

Ore ga Suki nano wa Imōto dakedo Imōto ja nai
Ore ga Suki na no wa Imouto dakedo Imouto ja Nai· 俺が好きなのは妹だけど妹じゃない
manga

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. (Source: Anime News Network)