Oops! The Prince Chased the Wrong Cinderella

Forced to transmigrate into the wicked stepsister in Cinderella, a high school girl tries to stick to the plot just to stay alive. However, her naturally kind heart constantly backfires on her attempts to be evil. Ultimately, not only does she accidentally run off with the prince, but she also teams up with a newly awakened Cinderella to tear up the script and shatter the ironclad rules of the fairytale world.