This is a story of a poor soul isekaid in a novel she knows has a bad ending of a character where she died at the end and she end up as that character.
She plotted to how to die to return to her world. And in action of that, a lot happen, despair, trauma, sadness, cruelity. A lot happened but in the end she succeeded and returned even with her dear loyal knight anakhim
Kill the Villainess