The Perfect Plan for a Fairy-Tale Ending

Once upon a time, Lalisa Blick was abused by her family, who wanted to take her diamond tears for themselves. Then one day, a prince appeared to save Lalisa and ride off into the sunset with her. But why was I reborn into this fairy tale as the evil sister, Marcia?! I need to leave this wretched house... but how can I leave my poor sister here in this hell hole? Instead of waiting for the prince to come, I can just bring Lalisa to him. This way, both of us can live happily ever after, right? (Source: Tapas) *Note: Includes seven extra chapters.*