The Perfect Plan for a Fairy-Tale Ending

"There was a pitiful girl who cried tears of diamond and lived while being abused by her family. But a prince appeared and killed off the entirety of the evil family. And so, the girl lived happily ever after with the prince." ...That is how the fairy tale goes, but I reincarnated as the evil sister, Marcia Blick?! This damned household! At the very least, I have to escape now! But if I run away, what about my sister who will be left behind? I've made my decision! We're going to run away together! "Larisa. Let's go find that prince who will make you happy! But... Prince, why are you proposing to me? Your partner isn't me but my sister! This sister of yours will make you a perfect-ending plan!"

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?