Married to the Cursed Dragon Prince

Ophelia, eldest princess of Windermere, fell for the knight Kalen who saved her—never knowing he was the Black Wolf King, using her only to get close to her half-sister Isolde. When the royal family must send a princess to marry the dragon prince sealed in the Abyss, Ophelia volunteers in her sister's place, arming herself with half a knight order and a vast fortune. She saves a dying little black dragon, Aur—actually the dragon prince—and heads into the Abyss.