I'm not sure if you take requests, but what would you think of this for a story?
Madison Beer x Sabrina Carpenter x Male Reader (Y/N)
Where we are just a normal guy (not famous or anything, not a soldier, etc, just a normal dude with like a 9-5 job).
Reader runs into them at a small restaurant / café, both of them are wearing sunglasses and hats to try and disguise themselves.
Maybe they could be prepping for their upcoming individual tours or something (to explain why they're in the same place).