Trapped as a Villainous Fake Sister

One moment, she is inheriting a vast fortune; the next, she finds herself trapped in the twisted drama of a wealthy family—and not as the beloved darling, either. Instead, she has landed the role of the story's villainess: the one who framed the heroine and turned the tale's greatest threat into her personal blood bank. Having offended virtually everyone around her, her only path to survival is a complete turnaround. To make it out alive, she must win over the heroine and humbly make amends with the villain, transforming from a scheming brat into a devoted little sister—all while desperately striving to avoid a truly disastrous end.