That Tyrant Duke is a Werewolf TTDIAW

Ruby Andres was suddenly transmigrated into the body of a noblewoman after an unfortunate accident inside the school library in the modern world. Now living as a daughter of a Marquis, she now faced the consequences of previously living a villainous life as Cataleya Briston. Because of the evil deeds of the previous Cataleya, she was fated to die an awful death in the hands of a tyrant duke--Adelard Cross, who was hiding a secret identity from society. Determined to escape death to befall her, she began to live a changed life. However, her fate might have planned to screw her over when the person who was destined to kill her, suddenly proposes for marriage one summer night at the grand ball...