I Became the Dying Female Lead's Sister

When an ordinary girl finds herself reincarnated as Lynzelle, the twin sister of her favorite novel's tragic heroine, she sees a chance to rewrite destiny. Determined to protect her beloved sister Lykke from a grim fate, she makes a bold decision: to take her place in an arranged marriage to Prince Hernan, a man rumored to be as cold as he is powerful. But as Lynzelle steps into this new life, she discovers that the prince may not be the monster everyone fears—and that navigating palace politics, sisterly bonds, and her own unexpected emotions might prove more challenging than any story she read in her past life. In a world where every choice could change everything, how far will she go to protect the ones she loves?