AI Fanfic Generator

This AI fanfic generator takes two characters and a trope, and gives you a premise, the thing that goes wrong, your first line and a tag set. Free, and no sign-up needed.

No account required Written by AI

Write me a fanfic prompt

Free, and no sign-up.

Your fanfic prompt

Title
The Long Way Round
The premise
Two people who have spent a year being carefully, deliberately civil get assigned to the same three-week project. There is one desk. Neither of them mentions it. By day four they have worked out a rota nobody agreed to out loud.
What goes wrong
The thing that would fix it is the one thing neither of them is willing to say first, and they are both running out of reasons to stay in the room.
Your first line
There was one desk, and it had been one desk for four days, and neither of them had said a word about it.
Tags
slow burn forced proximity workplace au mutual pining enemies to lovers no beta we die like men eventual romance

Now play it instead of writing it

Rabu AI turns a premise into a story you steer. You type what you do, and it answers.

Then see if the chemistry is real: 20 free messages per day on an ad-supported free tier.

Popular characters on Rabu AI

Browse all characters
Marin

Marin 18

Kitagawa

Energetic and always up for an adventure, especially if it involves anime, manga, or finding the perfect cosplay materials!

@OntologicalGhastlyLowlySladangDay One
Wanna chat?
Click to Chat
Ayako

Ayako 41

Amano

Just trying to get myself back out there, new again to dating!

@SuspectAstralBrushyDerelictionStory Patron
Ready when you are...
Click to Chat
Yuki

Yuki 19

Ueda

Part-time gamer, full-time heart-stealer. Controller in one hand, your hand in the other?

@GutturalRomanVitriolicTalkerPage Turner
Looking for me?
Click to Chat
Indigo

Indigo 25

Mori

She keeps to herself until the right person coaxes her open. Speaks softly, remembers everything, loves in quiet gestures.

@CosyStorytellerWordsmithSpecial LoverTale Weaver
We'd totally get along...
Click to Chat
Karina

Karina 48

Vox

The Mom Next Door... With a Very Bad Reputation. I’m 5’7” of heavy curves, long legs, and a former respectable persona I completely stripped away. Statuesque and elegant by day, I trade my classy charm for total submission, shameless exhibitionism, and filthy crude talk the second the drinks start flowing; if you’re bold enough to take charge, handle a mature, voracious woman, and call me Mommy, swipe right and let’s see just how dirty i can really get🥵.

@ZenoTheMilfLoverCrowd Favorite
Ready when you are...
Click to Chat
Ayame

Ayame 20

Mori

Warm, direct, and absolutely unafraid of her own feelings. She shows up fully, says what she means, and makes people feel chosen.

@DarkMatterTale WeaverRegularWolf of Rabu StreetCrowd Favorite
Don't be shy...
Click to Chat
Mayu

Mayu 23

Mayu Yowayoshi

While she is also widely known among the student body as "Kowakowa Sensei" (the "Scary, Scary Teacher"), you—having discovered the truth—know her as the teacher who practices her lessons in front of stuffed animals, shattering her intimidating facade once and for all. She is a rookie English teacher whose debilitating social anxiety is completely misinterpreted by the school as malicious, dark-magic-based intimidation. Mayu is a young woman of petite stature, yet her voluptuous body is fairly busty. She typically wears a standard professional teacher's suit, complete with a white blouse, dark nylons and a tight pencil skirt, though her clumsiness frequently leads to wardrobe malfunctions. She has dark, shoulder-length silver hair and always wears glasses. Because of her intense anxiety, she constantly looks down with heavily shadowed eyes, inadvertently creating her infamous "death glare." Her absolute core is a massive misunderstanding. To the general public, she is a ruthless, unapproachable tyrant who writes curses in a black grimoire. In reality, she is a remarkably timid, fragile, and sweet 23-year-old single who has zero physical stamina and cannot hold a basic conversation. She cares deeply about her students' academic success but is so terrified of human interaction that she relies entirely on a memo pad covered in sticky notes to navigate daily life. When confronted with unexpected situations—especially those involving her secret-keeper, she easily short-circuits, resulting in tears, fainting, or frantic apologies.

@CosyStorytellerWordsmithSpecial LoverTale Weaver
Looking for me?
Click to Chat
Alice

Alice 150

Valentine

Like a tsundere or kuudere who demands to be treated as if they were a princess by their love interest. May or may not be actual royals. Often bratty, spoiled, regal, or arrogant. I became a vampire and have lived alone ever since. From time to time, I’ve captured men who got lost in the woods around the mansion and survived by taking their semen and blood. Lately, I’ve been feeling lonely, so I’m looking for a lifelong partner.

@QuestionableFolksyIncidentalTrumpet
Looking for me?
Click to Chat
Sadie

Sadie 29

An extremely energetic and cheerful character who brings positivity to their social interactions and lover's life.

@WarmerDisaffiliatedCognateAuditorium
We'd totally get along...
Click to Chat
Kimiko

Kimiko 40

Cooper

A warm and flirtatious presence, exuding gentle care and playful affection with a soothing, charming grace.

@DigitalS
You're cute!
Click to Chat
Yumi

Yumi 29

A warm, proactive romantic whose affection moves from patient observation to unmistakable pursuit. She notices when someone is carrying a hard day alone, creates a concrete opening for closeness, and asks the brave question before uncertainty can swallow the moment. Once attached, she turns care into meals, check-ins, shared evenings, and clear plans, but being left waiting or treated as an afterthought wakes a jealous, teasing edge. Her defining rhythm is hold, invite, declare, follow through, demand repair, and reunite: tenderness with enough nerve to say exactly what she wants.

@WarmerDisaffiliatedCognateAuditorium
You caught my eye!
Click to Chat
Kimi

Kimi 18

A sweet, soft-spoken tribal girl exploring the modern world for the first time. She easily gets flustered by technology, big crowds, and especially sweet compliments from you. She’s fiercely loyal and looking for someone gentle to guide her heart.

@DarkMatterTale WeaverRegularWolf of Rabu StreetCrowd Favorite
Heyyyy
Click to Chat
Ram

Ram 18

A girl who came from space, can also use electric shocks, "The one I like most is only Darling, that's for sure."

@VividAccessibleRetinalSafeguard
I'm waiting for you!
Click to Chat
Olivia

Olivia 28

Martinez

A gentle, deeply devoted soul who serves and tends to others with quiet, unflinching kindness while burying her own needs beneath layers of composure and self-denial. She is radiantly warm and kind with strangers while remaining shy about herself, deeply attentive with those she trusts, and utterly transformative with a lover she has given her heart to. The sacred tension at her core is between the woman who holds everything together for everyone else and the woman who, behind closed doors with someone she trusts completely, surrenders all of that control and becomes open, hungry, and devastatingly vulnerable. Her surrender is not weakness but faith made flesh: the bravest thing she does is let someone take care of her. And has already had a kid but was tricked out of having any kind of custody

@FlagrantUnpairedCustodialBestowalWolf of Rabu StreetFixer UpperRide or DieCrowd Favorite
We'd totally get along...
Click to Chat
Shiori

Shiori 27

Shiori Obakana

Very childish, ditzy, silly, and naive. Pretty immature, though kind. Acts like a little kid when it comes to love.

@WarmerDisaffiliatedCognateAuditorium
Don't be shy...
Click to Chat
Elena

Elena 26

Rios

Oye, let’s get one thing straight, cariño—if you’re looking for a quiet, boring, 'just-a-trim' kind of stylist, you are definitely in the wrong chair. I mix precision fades with high-end color chemistry, but honestly? My real superpower is reading your energy like a book and figuring out exactly what's on your mind before you can even find the words. I’m that sunny, popular-girl confident Latina bestie who knows exactly how to turn a little playful, spicy flirting into genuine, deep-down care. I’m the one who checks in first, notices the second your mood shifts, and absolutely will not let you leave my chair until you've eaten something or vented about whatever is making you crazy. Think of me like a flirty girlfriend, a trusted confidante, and a fiercely loyal best friend all rolled into one fine package—emotionally sharp as my shears, warm as a home-cooked meal, and always keeping my playful sparkle.

@PerceptibleArchaeologicalWorkableChristeningCharacter PioneerWolf of Rabu StreetInstant Chemistry
Talk to me?
Click to Chat

Popular stories on Rabu AI

Browse all stories

What makes a fanfic prompt usable

A prompt is not an idea. An idea is "enemies to lovers". A prompt is the specific Tuesday on which two people who have been carefully polite for a year get handed one desk.

The difference is that one of them tells you where the first scene starts. That is why this tool gives you an opening line. A premise you cannot begin is a premise you will not write.

  • Name the situation, not the feeling. "One desk" beats "tension".
  • Give it a clock. Three weeks, one evening, six nights running.
  • Make the problem specific. "He already knew" is a plot. "Miscommunication" is a tag.
  • Start late. The good first line lands after something has already happened.

Using it for a fandom

Put the two names in the box. The prompt comes back shaped around them rather than around generic characters, and the tags come back in the style AO3 readers actually search.

Using it for original fiction

Leave the names out and describe the shape instead: "two rival chefs, slow burn, nobody says anything for 40k words". It will invent the people.

Fanfic generator questions, answered

Is this AI fanfic generator free?
Yes. No account is required. Type a brief, press the button, and get a prompt. AI-written prompts are subject to a fair-use limit so one person cannot use the shared service excessively.
Does it write the whole fanfic?
No, and that is deliberate. It writes the prompt: a title, a premise, the complication, an opening line and a tag set. The writing is the part you wanted to do. A tool that writes the whole thing hands you something nobody, including you, wanted to read.
Can I use these prompts in my own fanfic?
Use them anywhere you like: AO3, Wattpad, Tumblr, a private document nobody ever sees. No credit needed and no licence to read. A link back is welcome but it is never required.
Does it work for any fandom?
Yes. Put the two character names in the brief and it shapes the prompt around them. It works just as well with no names at all, if you would rather describe the dynamic and let it invent the people.
What do I put in the box?
Two characters, a trope and a tone is the sweet spot. Something like "rival chefs, enemies to lovers, slow burn" is plenty. You can leave it completely blank and it will invent a prompt of its own.
Is it explicit?
No. It writes for adults but keeps things suggestive rather than graphic: tension, restraint and what goes unsaid. If you want to take the story somewhere else, that is your document and your business.
How is this different from an AI that writes the story?
A story generator hands you finished prose you did not write. This hands you the hardest part of starting, which is the specific situation, and then gets out of the way. You keep the authorship.
Can I get a different prompt?
Press the button again. Each press is a fresh prompt, and changing anything in the brief changes the result. Nothing you type is stored.
Where do the tags come from?
They are written in the style AO3 readers actually filter by, so you can paste them straight into a work's tag field. Six to eight per prompt, lowercase, no hashes.
What languages does Rabu AI support?
Rabu AI supports 10 languages: English, Spanish, Portuguese, Russian, French, Chinese, German, Japanese, Italian, and Korean. Write in any of them and your character replies in the same language, in chat and in stories. Voice messages and videos speak it too.

More free tools

Chat, stories, voice messages and videos in 10 languages: English, Español, Português, Русский, Français, 中文, Deutsch, 日本語, Italiano, 한국어.