MYTHX.AI

AI Fanfic Generator

Describe your pair or your idea, or leave it blank, and get a fanfic premise, an opening paragraph and three scenes to write.

Free, no sign-up. Written by AI in about 5 seconds.

Example

The Knight's Oath

  • Forbidden Love
  • Canon-style

Person A is a knight whose impulsive nature and inability to follow orders constantly land them in trouble, but their skill with a blade is unmatched. Person B is the crown prince, bound by duty and protocol, who finds themselves both exasperated and intrigued by their unruly protector. When a threat emerges from within the palace walls, A's need for freedom and B's obligation to tradition collide, forcing them to choose between duty and their growing feelings.

Opening

The clang of steel echoed through the training yard as Person A disarmed their opponent with a swift twist of their wrist, sending the practice sword skittering across the cobblestones. They grinned, wiping sweat from their brow. 'That's three bouts in a row, Captain. Perhaps you should consider a different line of work.' The captain scowled, but before he could retort, a sharp voice cut through the air. 'Person A! You were ordered to report to the east gate an hour ago.' Person A turned to see Person B standing at the edge of the yard, arms crossed, royal robes immaculate despite the dust. 'I was busy,' Person A shrugged. 'Busy disobeying direct orders again,' Person B replied, but their lips twitched. 'Come. We need to talk.'

Scenes to write next

  1. 1

    Person A sneaks out of the palace to investigate a lead on the threat, and Person B insists on accompanying them, leading to a tense but intimate conversation about their roles and desires.

  2. 2

    During a formal ball, an assassination attempt forces Person A to break protocol to save Person B, and in the chaos, they share a desperate kiss before A is arrested for their actions.

  3. 3

    Person A is imprisoned, awaiting trial, but Person B defies the council to free them, and they escape together, choosing each other over duty and starting a new life beyond the kingdom's reach.

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What makes a fanfic idea worth writing

The best fanfic prompts are not plots. They are a situation that forces two people into the same room with different wants. "Person A owns a cafe, Person B is the critic who called their latte a blown-out candle, and Person B keeps coming back every Tuesday without ordering" already has the fight, the chemistry and the question the reader needs answered.

That is what this fanfic generator writes for, every time:

  • Two wants that collide. Person A and Person B each want something, and the trope makes those wants crash into each other.
  • An opening you can keep. The first paragraph starts inside a moment, with dialogue or an action, so you can paste it in as your first page and keep going.
  • Three scenes to write next. The middle and the payoff, so a one-shot has an ending and a multi-chapter fic has a spine.
  • Any pairing. The leads are Person A and Person B, the way OTP prompts have always worked. Describe your characters and the idea is built on their traits, then you write them in.

Tropes and AUs, in one line each

Enemies to lovers: real opponents, a real reason, and respect that turns into more. Slow burn: feelings built over many small moments before anyone says them. Fake dating: a pretend couple for a practical reason, until it stops being pretend. Found family: people with no one become each other's someone. An AU, or alternate universe, moves the characters into a new setting, like a coffee shop, a college campus or a royal court, to see who they are there.

How to use your idea

Swap in your pair and read the premise again in their voices. If it fits, keep the opening and write the three scenes in order. If one detail feels off for your characters, change it; the idea is a starting point, not canon. Using your own characters? Give the generator their names and a few traits and it writes with them.

Short on a spark? Our romance roleplay ideas are sorted by trope, and the 200 writing prompts work as fanfic seeds too. For a longer arc, the plot generator outlines five beats with a twist.

Fanfic ideas by trope

Six ideas this generator wrote, one for each trope and AU shown.

Enemies to lovers · Coffee shop AU

The Regular Who Never Orders

  • Enemies to lovers
  • Coffee shop AU

Person A owns a small cafe called The Second Cup and has spent two years quietly at war with Person B, a food critic who once wrote that the cafe's signature cardamom latte tasted like 'a candle someone blew out.' Person B now comes in every Tuesday, orders nothing, and sits by the window typing. Person A wants the review taken down; Person B wants a reason to keep coming back that they cannot explain yet.

Opening

Person A was wiping down the espresso machine when the bell over the door rang at 4:40, eleven minutes before close. Person B walked in shaking rain off their umbrella, took the same window table, and opened their laptop without ordering anything, the way they had done every Tuesday for a month. Person A set the rag down. 'We close at five,' they said. Person B didn't look up. 'I know.' 'And you're not going to order.' 'I'm thinking about it.' Person A poured a cup of the cardamom latte anyway, slid it across the counter, and said, 'Then think faster. It's on the house tonight.'

Scenes to write next

  1. 1

    Person B finally orders something other than the latte and mentions, too casually, that the candle line in their review was the meanest thing they had ever written and they have never stopped regretting it.

  2. 2

    A power outage during a Tuesday storm forces the two of them to share a candle at the window table, and Person A learns Person B has been coming back because the cafe is the only place where no one expects them to be a critic.

  3. 3

    Person B publishes a new review, this time of the latte, and shows up at opening with a hand-written note asking Person A for an actual first date, no espresso machine between them.

Fake dating · Royalty AU

The Crown's Borrowed Vow

  • Fake Dating
  • Royalty AU

Person A is the heir to a failing kingdom, forced into a political marriage to secure an alliance. Person B is a palace guard with a secret debt that can only be paid by gaining access to the royal vault. When A proposes a fake engagement to buy time, B agrees for the vault key, but their staged affection begins to feel dangerously real.

Opening

The rain hammered the stained glass of the council chamber as Person A slammed the ledger shut. "Three hundred gold pieces short, and my uncle expects me to smile through a wedding to a stranger?" Person B, standing guard by the door, kept their eyes forward. "Your Highness, the envoy from the southern coast arrives at dawn." A spun around, a silver ring on their thumb catching the candlelight. "Then we have until dawn to make him believe I'm already taken." B's grip tightened on their spear. "Taken, Your Highness?" "By you," A said, and B's heart stuttered, because the vault key hanging from A's belt was the only thing that could clear their family's name.

Scenes to write next

  1. 1

    Person A and Person B rehearse their fake courtship in the moonlit garden, where B's clumsy attempt to hold A's hand turns into a genuine moment of laughter.

  2. 2

    During a banquet, a rival noble questions their engagement, forcing A and B to share a convincing kiss that leaves them both breathless and confused.

  3. 3

    After B confesses the truth about the vault key, A reveals the kingdom's treasury is empty, and they must decide whether to risk everything for a love that began as a lie.

Slow burn · Fantasy AU

The Lantern Keeper's Debt

  • Slow burn
  • Fantasy AU

Person A is a mortal cartographer who maps dying stars; Person B is an exiled star-spirit bound to a lantern that Person A accidentally lights. To free Person B, they must complete an impossible atlas, but each map they finish draws Person A closer to becoming a star themselves. Their wants collide: Person A craves the sky's secrets, Person B just wants to go home before Person A burns out.

Opening

Person A had mapped six hundred and eleven stars, and every one of them was already dead. The seventh, still warm, sat in a brass lantern on the windowsill, flickering like a held breath. They reached for the wick with a taper, and the flame caught blue. A voice said, 'You have very poor taste in company.' Person B unfolded from the light, all sharp edges and cold air, and frowned at the ledger open on the desk. 'You're charting corpses,' Person B said. 'Mine included. Put the pen down.'

Scenes to write next

  1. 1

    At the night market, Person B haggles for ink made from ground meteorite while Person A sketches the way Person B's hands glow when they lie, and neither mentions that the lantern's flame has started to lean toward Person A.

  2. 2

    A storm traps them in a bell tower, and Person B admits the atlas is a cage, not a key, while Person A finally shows the empty final page meant for their own name.

  3. 3

    On the last page, beneath a sky Person A drew from memory, Person B chooses to stay and kisses Person A as the lantern goes dark, mortal and warm.

Found family · Space AU

The Parts We Keep

  • Found Family
  • Space Station

Person A is a lonely hydrologist on the aging space station Halcyon, maintaining the water reclamation system while dreaming of a transfer to the bustling core worlds. Person B is a cynical cargo pilot whose ship is impounded for smuggling, forcing them to work off their debt on the station. When a station-wide quarantine traps them together with a ragtag group of residents, they must rely on each other to survive and, in the process, build a family they never expected.

Opening

The water reclamation unit was singing again. Person A pressed their palm against the main intake pipe and felt the vibration hum through their bones, a low, mournful note that meant the secondary filter was about to fail. They had replaced it twice this month already. From the corridor, a clang of boots on metal, then the hiss of the docking bay doors. Person B strode in, still in their flight jacket, carrying a duffel bag that bulged in odd corners. 'You the one who fixes things?' Person B asked, dropping the bag with a thud. Person A didn't look up. 'Depends on what needs fixing.'

Scenes to write next

  1. 1

    Person A teaches Person B how to patch a leaking pipe, and they bicker over the right way to seal a joint, but end up working in sync as the station's oxygen levels drop.

  2. 2

    During a blackout, Person A admits they've never had a real home, and Person B quietly shares a protein bar and a story about their own lost family, the first honest moment between them.

  3. 3

    When the quarantine is lifted, Person B's ship is cleared for departure, but they choose to stay, and the group turns the empty cargo bay into a shared mess hall, officially becoming a family.

Rivals · Office AU

The Corner Office

  • Rivals
  • Office AU

Person A and Person B are senior analysts at a cutthroat consulting firm, both gunning for the same promotion to director. When a high-stakes client project forces them to share an office, their professional rivalry turns into late-night strategy sessions, stolen glances, and a battle for the corner office that neither expected to enjoy.

Opening

Person A slammed the file on the desk, the thud echoing in the cramped office they now shared. 'You re-ran the projections without telling me?' Person B didn't look up from their laptop, fingers flying. 'Your model had a decimal error. I fixed it. You're welcome.' The fluorescent light hummed. A half-eaten bagel sat on Person A's side, next to a neat stack of sticky notes in Person B's handwriting. 'We're supposed to be a team,' Person A said, voice tight. Person B finally met their eyes. 'We're supposed to win. There's a difference.' Outside, the city glittered, indifferent.

Scenes to write next

  1. 1

    Person A and Person B are forced to co-present to the client after a last-minute crisis, and Person B covers for Person A's mistake, earning a rare thanks.

  2. 2

    A late night at the office turns personal when they share takeout and Person A admits they're only competing because they need the money for a family emergency.

  3. 3

    The promotion decision looms, and they must choose between sabotaging each other or teaming up to propose a joint role, leading to a confession and a kiss in the empty corner office.

Soulmate AU

The Last Words on My Skin

  • Soulmate AU
  • Soulmate Marks

In a world where every person is born with the last words their soulmate will ever say to them written on their skin, Person A has spent years avoiding love because their mark is a goodbye. Person B, a pragmatic bookbinder who repairs damaged volumes, believes the marks are a cruel joke and refuses to read their own. When Person A brings in a water-ruined journal to be restored, the two clash over fate, fear, and the quiet courage it takes to speak first.

Opening

The bell above the bookshop door chimed in a tired, tinny way, and Person A stepped in from the rain with a plastic bag held out like an offering. Person B looked up from the spine they were pressing and said nothing. 'It fell in the river,' Person A said, placing the bag on the counter. Inside, a leather journal had swollen into a brick of warped paper. 'I know it's probably hopeless.' Person B peeled back the plastic and ran a thumb along the waterline creeping up the cover. 'Hopeless is a word people use when they want permission to stop trying,' they said. Person A's jaw tightened. 'I'm not asking for a lecture. I'm asking for a miracle.'

Scenes to write next

  1. 1

    Person B carefully separates the saturated pages and finds a photograph tucked in the back, forcing Person A to explain why the journal matters and why they cannot simply let it go.

  2. 2

    Over late nights in the bindery, Person A notices a smudge of ink on Person B's collar and realizes it matches the opening words of their own soulmate mark, while Person B admits they have never once looked at their own skin.

  3. 3

    After the restored journal is returned, Person B finally reads their mark aloud in the empty shop, and the words are the same ones Person A has carried since birth, turning a goodbye into a beginning.

Fanfic generator FAQ

Type an idea or describe your pair, or leave it blank for a random idea, then pick a trope and an AU. An AI writes an original fanfic idea in a few seconds: a title, a premise, an opening paragraph and three key scenes to write next.

Yes. It is free and needs no sign-up. Each visitor can write a few dozen ideas an hour; past that, the tool shows ideas from our example library until the limit resets.

Fanfic prompts traditionally use Person A and Person B so any pair from any fandom fits. The generator never names characters, places or terms from published books, shows or games. Describe what your characters are like and it builds on those traits, then you swap in their names as you write.

Yes. Give your OCs names and a few traits, for example "my OCs Juniper, a shy blacksmith, and Rafe, a loud bard", and the idea is written with their names.

Enemies to lovers, slow burn, fake dating, friends to lovers, found family, hurt/comfort and forced proximity are among the most used tags on fanfiction sites. Coffee shop, college, royalty and soulmate AUs are the classic alternate universes.

Yes, the idea is yours to use and change. If you post on a fanfiction site, check its rules on AI-assisted writing, since some sites ask you to tag it.

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