Aru Hi, Burikko Akuyaku Reijou ni Narimashite.

A high school student named Manami falls down the emergency stairs and awakens as a three-year-old in a world from an otome game. She discovers she has taken the form of a rival character, the stubborn and oblivious daughter of a marquis family. The character's fate is to be socially destroyed. Initially, Manami assumes this is a dream and decides not to be concerned. She focuses on learning magic instead. The story originated as a web novel titled "Otome Game no Burikko Akuyaku Onna wa Mahou Otaku ni Natta" on Shousetsuka ni Narou.