If I’m honest with myself, I’ve never run or played in a one-shot of *Masks* that I didn’t want to see spin out into a long-running game where I could fully explore the characters and get to know them. One-shots are teasers for a show you’ll probably never get to see. They are, in a sense, the one that got away. So love them, but you *have* to let them go. This leaves you free to turn everything up to eleven—don’t hold back, don’t wait for the big reveal. Just get everyone on a page and go for it. Things can be as full of shorthand and tropes as you want—you won’t have time to really earn your payoffs, so don’t worry about it.
Start with a tight relationship web, ratchet that tension up, then throw them into a fight so they can’t resolve the relationship tension yet. Give them downtime with a dash of team time and a dash of regular lives—as the characters and playbooks call for—and then build towards a big finale fight. If you have time, get a little dénouement, over shawarma or similar, and see if you got to hit all the basic, influence, and team moves. That should be good. It’s just a taste, try a little of everything.