End of the World: The world is ending. Is it due to an imminent nuclear strike, an incoming comet, a plague, or a zombie apocalypse? What do the characters do in the moments leading up to the end? If there are survivors, what are their next steps?
Blackjack: Take your OTP and put them in a casino. Character A is an attractive Blackjack dealer. Character B is a determined gambler who can’t seem to stay away from Character A’s table.
At the Con: The characters are at a convention. Is it a convention taking place in their universe, or a modern day AU? Is it an anime convention, a gaming convention, a furry convention? Which of the characters dress up? Which of them go to get drunk and stumble around the raves? What madness ensues?
Office Space Cheer: The characters all work in an office building. Every day, someone keeps on bringing in homemade food for the break room. Each time, it’s something that one of the workers particularly likes. Who’s bringing in these treats, and why?
Songfic: Write a songfic involving one or all of the following songs: “DNA” by Little Mix, “Opposites Attract” by Paula Abdul, and “Voodoo” by Godsmack. Have fun!
Killer Pet: Character A gets a new pet, which turns out to be a vicious beast. Does Character A know, or does the animal act innocent when they’re around. Does the pet secretly want to eat Character A, or is it fiercely protective of its new owner? Do the other characters figure it out, or is it only one character who knows? Does the killer pet become the ultimate protector, or the bane of everyone’s existence?
The Dragon and the Knight: Take your OTP. Now, make Character A a fire-breathing dragon, and Character B a knight in shining armor. Is Character B tasked with slaying Character A, or delivering them tribute from a fearful village? How do they fall in love? Can Character B shapeshift into a human-esque form, or is the romance more of an emotional one than a physical one? This can also work in a platonic sense, of course. I’m just a sucker for cross-species romances.