Goemul Gongjagui Gyeyang Gongnyeo

A noble family, the Speràdo, holds a legacy of shadow magic, though no one has used it in a century. Marquis Speràdo attempts to sacrifice Leslie to favor her sister Ellie, inadvertently awakening dark powers within her. Seeking to escape her family's cruelty and greed, Leslie offers a deal to the Monstrous Duke: in exchange for adoption, she will serve his interests with her newly awakened abilities. The story explores whether Leslie can break free from her family’s control or fall victim to their continued mistreatment.