Isn’t there a fairy tale along those same lines? Where they put all the princes (or princesses) in masks at a ball and invited the whole land and only the person who was meant to marry the heir actually found them because it was true love, ect. Am I hallucinating this fairy tale?
Isn’t one of the scenes in Jim Henson’s Labyrinth? when Sara finds Jareth in masks at a ball?
Even more, it is the way in which Romeo and Juliet met, without know who they are… and mainly a cliché in that sort of “true tragic love” stories, i’m sure there are more.
So no, you are not hallucinating 😉