“The reason I’m leaving this letter… you probably already know. It’s to keep my promise.” Elisha—the Archmage of the Cardion Empire and fiancée of Emperor Erich. “Your Highness—no, Your Majesty—you always used to say it, didn’t you?” “I’d never marry you, even if it killed me!” Then one day, she disappears without a trace, leaving behind nothing but a single letter for her fiancé. But contrary to Elisha’s expectation that he wouldn’t look for her, Erich immediately begins the search. “Whether she’s still in the Empire or has fled abroad—it doesn’t matter. Just find her and bring her back.” Once she’s brought before him… “We’ll make a new promise.”