Gakuen no Hime Kouryaku Hajimetara Shuraba ni Natteta Ken

Historia

“Make me a princess!” One day, Yuma Kanbara finds himself in a tough spot, when his younger sister, Ayane, blackmails him with a certain cringe-worthy secret from his past. Her demand? To secure her a spot among the “Hime 6,” the prestigious titles awarded only to the top six candidates in Himegasaki Academy’s famous general election. Determined to claim the throne, Ayane leverages Yuma's weakness to make him “conquer” her rival princess candidates to clear the path to her victory.

Sinopsis vía AniList (en inglés).