Fanfic Prompts for Any Fandom, Any Pairing

Strip your characters of the canon plot and put them in a neighborhood café. Character A works the morning shift; Character B orders the same thing every day at 8:14 until the day they don't show up. Write what Character A does next — and what their reaction reveals about feelings they hadn't admitted to themselves.

Character A and Character B are assigned as partners on a semester-long project in a class one of them is acing and the other is failing. Write their first study session, where the failing one turns out to understand something the acing one never noticed — about the subject, or about people.

Take characters from a fantasy, historical, or sci-fi canon and drop them into an ordinary modern life: rent, group chats, IKEA furniture. Write a scene where a mundane problem — a missed bus, a broken phone screen — triggers the same dynamic the characters had in canon, just scaled down to everyday stakes.

Character A runs a small shop. Character B opens a competing one directly across the street. They sabotage each other's window displays, poach each other's regulars, and know each other's schedules suspiciously well. Write the day an actual crisis — a flood, a break-in, a chain store moving in — forces them onto the same side.

Your characters are a band on the edge of either breaking up or breaking through. Character A writes the songs; Character B is the reason half of them exist, and doesn't know it. Write the rehearsal where Character B finally pays attention to the lyrics.

Character A is stuck repeating the same day. The loop only ever changes in one way: Character B's reactions are never quite identical, as if some part of them remembers. Write the loop where Character A stops trying to escape and starts using the repeats to learn everything about Character B they never bothered to ask.

Character A got hurt during the last mission, fight, or disaster — and hid it, because the team needed them functional. Character B is the one who notices: a flinch, a favored arm, a jacket worn indoors. Write the confrontation, where Character B's anger is really fear wearing a disguise.

Character A and Character B part ways on an argument — petty, unresolved, full of things said badly. Then Character B goes somewhere dangerous, and for a stretch of hours or days, Character A doesn't know if they're coming back. Write the waiting, and then write the reunion, where the argument suddenly costs nothing and admitting that costs everything.

An accident, a curse, or an enemy's weapon takes Character B's memories of Character A — only those. Everyone else remains familiar. Write Character A deciding whether to rebuild the relationship from scratch or quietly step back, and write the moment Character B, with no memories at all, starts gravitating toward them anyway.

Character A owes Character B an apology years overdue — for a betrayal, a silence, a choice that looked like abandonment. They've drafted it a hundred times. Write the day news arrives that Character B is in danger or leaving forever, and Character A has one chance to say it badly in person instead of perfectly never.

Character A learns that staying close to Character B puts B in danger — a target on their back, a curse that spreads, an enemy who hurts what A loves. So A leaves without explanation, letting B believe the worst. Write the scene, months later, where Character B finds out the real reason — and is furious about it.

Character A is extraordinary at canon things and hopeless at one mundane skill — cooking, swimming, riding a bike, taxes. Character B teaches them, badly, with great patience. Write the lesson, the failure, the second attempt, and the moment Character A realizes B has been making the failures fun on purpose.

The whole ensemble gathers for a holiday none of them celebrated growing up, for different reasons. Someone burns the main dish. Someone brought a guest no one expected. Write the dinner from Character A's point of view — the one who never believed they'd be on anyone's guest list, counting the chairs around the table.

Character A — the invulnerable one, the responsible one — catches a perfectly ordinary cold and is terrible at being sick: denial, escape attempts, working from under three blankets. Character B appoints themselves warden. Write the day, including the fever-soft moment where Character A says something honest they'll claim not to remember.

A stray animal starts following Character A, who insists they are not keeping it while visibly keeping it. Character B watches the denial unfold over weeks: the food bowl that's "temporary," the vet visit that's "just responsible." Write the moment Character A finally names it, and what B understands that naming to mean.

Character B has slowly colonized Character A's home — a toothbrush, a preferred mug, a drawer that became their drawer. Neither has said anything official. Write the evening Character A hands over a copy of the key, disguised as a practical errand, and both of them pretend their hands aren't shaking.

Pick the canon moment your fandom never recovered from — a death, a betrayal, a sacrifice — and undo it with one changed detail: a letter delivered on time, a door locked, a train missed. Write the week after the divergence, tracking how one survival or one prevented mistake rewires every relationship around it.

Character A and Character B met in canon as adults, rivals, or enemies. Rewind: they meet as kids, as students, as strangers in line — years before the plot finds them. Write their first canon-timeline meeting again, except this time they recognize each other, and everything the canon scene assumed is suddenly wrong.

At some point in canon, your hero was offered a deal and refused it. Write the version where Character A says yes — for a sympathetic reason: to save someone, to end a war faster, out of sheer exhaustion. Follow them three steps down that road, to the first moment they can't tell anymore whether they're still pretending.

Find the moment your canon split its characters onto separate paths — different factions, different cities, a quest one joined and one refused. Write the version where Character B chooses the other branch and ends up beside Character A for the events canon made them miss. One canon scene, now witnessed by exactly the wrong (or right) person.