Avenger of the Villainess

At the age of 20, Orlane Roche was betrayed by the man she most loved in the world and accused of high treason, but for some reason, instead of death, she has been given life imprisonment.
Confined to a locked room with only her thoughts, in despair, she commited suicide by hanging, but not before vowing to return and enact bloody revenge against the people who wronged her, specially towards one man in particular, the Crown Prince-- now Emperor of Velza, Gilbert.

--20 years later,
Cecelia Zadkar, crown princess of one of the northern kingdoms, who is currently living as a political hostage in the Velzan Empire, the greatest superpower in the continent, awakens to her past life memories as Orlane and learns of her tragic fate at the hands of the man she vowed to protect.
It would be the perfect opportunity to enact revenge...

--Except for the fact Cecelia is deeply loyal to her beloved princess Adelheid, the daughter of the man who killed her in a past life.

My first novel! this is just a pure unadulterated brain fart but i hope you guys enjoy the ride ^^ contains a bisexual protagonist and slight romantic elements with both genders, though it's not the main focus.