The December issue of Kadokawa's Dragon Age magazine announced on Thursday that Seiji Ebisu's Ore ga Suki nano wa Imōto dakedo Imōto ja nai (The One I Love is My Little Sister But She's Not a Little Sister) light novel series is getting a manga adaptation by Kō Narita in the magazine's next issue in December.

The "awkward sibling romantic comedy" series centers around the younger sister Suzuka Nagami and the older brother Yū Nagami. Suzuka 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 the novel wins a light novel award. After they discuss the matter, Yū is the one who debuts as a proxy light novel author instead of Suzuka, under the pen name Chikai Towano.

Ebisu launched the light novel series with illustrator Gintarō in 2016, and Kadokawa published the fourth novel on August 19. The novels are inspiring an anime adaptation.