I Became the Young Villain's Sister-in-Law

Reborn as an amnesiac extra, Elia craves a simple life in the forest. But fate intervenes when she rescues a child who uncannily resembles her lost brother... and is the story’s villain. Suddenly thrust into the main plot, she fights to lift a fairy curse off the villain’s brother and even enters a contract marriage. Elia is beginning to wonder… is she the cause of all this trouble?

(Source: Tapas)