The Villain's Cannon Fodder Bride

[WARNING: MATURE CONTENT] Reborn into the world of her favorite novel, 'Auberon's Edge', as the maid to an insignificant side character—the doomed princess destined to be married off to the villain and then killed in a fit of rage—Rache faces a moral dilemma. Should she use her knowledge to flee the soon-to-be-conquered nation and live somewhere safe, or risk altering the book's fate by warning Princess Airie about her impending doom? Before Rache can decide, she is ambushed in her bedroom by the princess's guard. Knowing how dangerous the black-hearted prince of Sidera is, the princess declares that she will force her maid to go in her place due to the maid's striking resemblance to her own rare features, while the real princess goes into hiding until her parents can find a way to untangle themselves from Sidera's web. "Remember, if the prince finds out the truth, he'll kill you first." Trapped in a marriage to a cold-hearted sadist who only loves violence, railroaded into a pointless ending before the story even begins. There is no escape from this twisted romance but death. Rache, now the new Princess Airie, will not go quietly into the night. "Let's break up!"