Synopsis: Let's pretend we don't know each other from now on

"The reason I am leaving this letter behind, as you might already know, is to keep my promise." Elisha, the Archmage of the Cardion Empire and the fiancée of Emperor Erich. "You know what you always used to say, Prince, no, Your Majesty. 'I'd rather die than marry you!'" One day, she disappears without a trace, leaving only a single letter for her fiancé. However, contrary to Elisha's expectation that he wouldn't look for her, Erich immediately begins to search for her... "Whether she is within the empire or has left the country. I just need to find her and bring her back." Once she is found and brought before my eyes, then. "We will have to make a new promise."