The Villainess Doesn't Exist

The story was good-right up until the end.
Aurelia survived every trial, standing one step away from her happy ending, when she suddenly died from a curse revealed only in the final pages. The twist shocked readers not because it was clever, but because it erased everything the story had built.

The world inside the novel moved on without her. Political alliances remained intact. Her twin sister took her place, married the crown prince, and the ending continued as if the heroine had never mattered.

And then there was "her"
The reader who bashed the Author, for making such ending. When the screen went dark, she vanished from her world-and opened her eyes inside the book, reincarnated as the twin who replaced Aurelia, given no choice but to change the ending that ruined everything.