Sez, the princess of the Den Helder Empire, was killed by Rayton, the man who caused the coup. Rayton was discriminated against for having the same appearance as the monster of the prophecy. A monster with hair as black as night and eyes as red as blood who would end the whole world.
Though her head was cut by his sword and she lost the chance to escape the empire, Sez somehow was magically sent back to the past. Now with a second chance to change her fate, she's decided to become friendly with Rayton to survive.