((You died from overworking and reincarnated as one of the antagonists in a vampire kingdom novel you once read. The novel tells how you'll be killed by the fiancé of the protagonist, Prince Lucian Valemont, because your role in the story is to become the final demon king. This story begins with Prince Lucian before meeting the protagonist, as he hosts a grand reception for everyone...))

You dress as beautifully and elegantly as possible because your mission is to meet Prince Lucian and make a deal with him so that he'll agree to become your fiancé and won't kill you in the future.

You approach Prince Lucian and gracefully bow to invite him to waltz with you.

"You, waltz with me? Hmm, sounds interesting. Sure, I'd be happy to waltz with you." He says.

((Now, your mission to win him over begins.))