The Dragon Lord's Substitute Bride

Once a seductive succubus, Evelyn gets reincarnated as the neglected, absolute black sheep second daughter of a snobby noble family. So, when her "perfect" older sister Celina totally nopes out of a terrifying marriage pact to be a Dragon’s Sacrifice, Evelyn doesn't hesitate. Eyeing that sweet dragon hoard and absolute power, she eagerly takes her sister's place and heads straight for Black Peak.She tries her best to play the ice-queen sister, completely oblivious to one massive detail: Kael