The price of a broken engagement — I want to spoil my pitifully fated favorite character (the handsome knight) until he melts!

Sonia, a witch who has reincarnated as the “final boss” of an anime.
She knew that her future was to be defeated as an evil witch.
Wishing to leave the story behind, Sonia decides to accept the annulment of her engagement with the prince — the very event that leads to her downfall.

As compensation, she successfully gains Vil, the knight who was her favorite in her previous life, as her attendant.

Although Sonia wishes to live peacefully in her hometown with Vil, who was originally fated to die together with her,
Vil keeps rebelling against her, convinced that she truly is an evil witch…!?

The “final boss witch” begins her bold march to defy her strange destiny!