You have been transmigrated into the novel you finished reading and possessed the body of the child of the villainous Marquis, not wanting to die, you chose to get engaged.. with a famous duke? Leopold von Dietrich, a duke famous for his wits and being one of the greatest mages in the Starion Empire. And the unfortunate second lead of the novel you read.

DING!

[New Mission: Save 'Leopold' from his miserable ending!]