My brain can't handle the fact that AU apparently means "setup" or "scenario" or "meet-cute" rather than actually being a description of the universe which is alternate.
AU List: "Flower Shop AU"
My neurodivergent ass: "The whole world is a flower shop. It's an infinite flower shop where things keep getting more eldritch the further down you go. On the top level you have sunflowers and roses. Then you have man-eating flowers. And a little further down you have flowers the color of your soul and that smell like your first kiss -- the action, not the person who gave it to you."
Fandom: "Okay... yeah... but I just meant a story where your favorite couple meet in a flower shop?"