I Thought I Reincarnated as a Villainess, but It Turned Out to Be Cinderella's Step-Sister: Cinderella Otaku's Reincarnation in Another World

Cinderella is a fairy tale beloved the world over. The protagonist, Stella, has been reincarnated into this world as Cinderella's bullying step-sister, a villainous young lady. In order to avoid the tragic ending that is the conclusion of the fairy tale, she tries to become friends with Cinderella, but...!?