Replacing My Sister, the Knight for Me Wept in Regret

Sylvia, abused by her father and betrayed by Thorne, takes her stepsister Lyra's place to wed into Fantasy Forest. Her blood awakens the slumbering Elf King Eziel, who loves and protects her. When Thorne finds out the truth, he regrets bitterly. But it's too late. Sylvia has risen as supreme queen, and rules the land peacefully alongside Eziel.