The Weakest Manga Villainess Wants Her Freedom!

Oh, crud, I just realized that I've been reincarnated into my favorite manga as the first boss defeated by the heroine at the start of the story

Worst yet, it turns out my fianc is the strongest of the Four Grand Magi and the very villain who slanders my character as a disgrace on her deathbed I'm outta here

This is the story of the weakest manga villainess who seeks out the slow life instead of the villain life.