Aru Hi, Burikko Akuyaku Reijou ni Narimashite

Aru Hi, Burikko Akuyaku Reijou ni Narimashite summary: After falling down the emergency stairs at school, high schooler Manami found herself transformed into a five-year-old character in an otome game - specifically, the bratty and clueless rival daughter of a marquis family. Despite knowing that this would lead to social ruin for her character, Manami shrugged it off as just a dream and focused on mastering magic instead.