The Monster Duchess and Contract Princess

Read manhwa The Monster Duchess and Contract Princess / The Monstrous Duke’s Adopted Daughter / A Duquesa Monstruosa e a Princesa de Contrato / Bản Khế Ước Với Nữ Công Tước Ác Ma / Canavar Düşes ve Sözleşmeli Prenses / Goemul Gongjagui Gyeyang Gongnyeo / L’enfant des ténèbres / La duchesse monstrueuse et la dame du contract / La duchesse monstrueuse et la princesse par contrat / La duquesa monstruosa y la princesa del contrato / Nữ công tước quái vật và công chúa hợp đồng / Putri Kontrak dan Duchess Monster / The Monster Duchess and the Contract Lady / The Monster Duchess and the Contract Princess / Witch’s Counterattack / Княгиня чудовищ и принцесса по контракту / داچس هیولا مانند و شاهزادهی قراردادی / 怪物公爵と契約公女 / 魔女的逆袭 / 魔女的逆襲 / 괴물 공작가의 계약 공녀

Leslie’s life was always used for the betterment of her sister, Eli.
After a failed attempt to extract the black magic within Leslie to transfer to Eli; Leslie knocks on the door of the monster Duchess and pleads for the Duchess to adopt her?!