A spinoff of Ore no Imouto ga Konnani Kawaii Wake ga Nai following Kuroneko's route. This manga is a new story based on volume 15 and 16 of the Oreimo lightnovel written by the original author Tsukasa Fushimi. Not to be confused with Ore no Kouhai ga Konna ni Kawaii Wake ga Nai, which is another spinoff.

Yuuto enters his all-boy junior-high with the hope of joining a manly cheering squad, but is surprised to find all the boys in the club dressed as girls.

Kanata Tsukishiro's dead twin sister frequently takes possession of him, and so he asks Yumeto Ookawachi, who his sister had a crush on before she died, if he would help her to pass on.