Generally, I prefer no story, especially if the models can't act. An intro is okay if it's a short interview with the models (Broke Straight Boys) or some scenes of them hanging out before the shoot (Sean Cody).
Someone pointed out a video the other day that had a story that actually made me laugh. It was the "call the plumber who ends up plumbing more than the plumbing" scenario, but the reason the plumber was called was funny: Dan Broughton got his toe stuck in the tub faucet.
https://www.boyfriendtv.com/videos/504208/dan-broughton-and-theo-reid/