May I Kill You, Your Majesty?

As the daughter of a concubine, Erendelle suffered from years of abuse before being executed as a traitor to the crown. But she comes back in time due to a mysterious ring, giving her a chance to set things right... only to fail and die thrice. So this time, Erendelle decides to survive by seducing Castian, the prince responsible for her death. The only issue? She's from a family that he considers to be his enemy! Will Erendelle overcome this high hurdle and avoid dying a fourth time?