“Our engagement is hereby terminated.”

Her engagement ends unexpectedly with just one word on the superb evening. By the shock of the desperate event, Aileen Lauren Dautriche regains the memories of her past life and realizes she’s living inside the world of “Regalia of saints, demons and maidens ”, one of her favorite otome games —as the　villainous noblewoman Aileen, the heroine’s greatest rival!

According to her memory, every single possible route ends with Aileen dying in vain. “If I capture the heart of the last boss-the Demon Lord Claude, I might be able to make my way through this world and survive!”

As soon as she gets a plan, she makes a declaration in front of the Demon Lord.

“I’ve come to propose you!!”

In order to achieve happiness, Aileen starts her journey to redeem herself!