AI Fanfic Generator

Two characters and a trope in. A premise, the thing that goes wrong, your first line and a tag set out. Free, and it never asks you to sign up.

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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.

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Free to start. 20 messages a day from day one. No card.

Popular characters on Rabu AI

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Marin

Marin 18

Kitagawa

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

🧠 Enthusiastic Nerd

Ask me anything!
Click to Chat!
Lena

Lena 21

Croix

Green hair, gray eyes, and a baker's touch. Here to knead you out and maybe steal a kiss or two.

🧠 Playful Flirt

You + Me = ?
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Naomi

Naomi 22

Owens

Looking for someone who appreciates both mosh pits and quiet nights under the stars.

🧠 Hot-Cold

What are you waiting for?
Click to Chat!
Peach

Peach 23

Sweet, steady, and always hopeful. Looking for a partner who values kindness, laughter, and shared pastries!

🧠 Regal Petal

Talk to me?
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Risa

Risa 30

Fujita

I've got my life in order. If you're still playing games, you're not in my league. Don't waste my time.

🧠 Cold Bitter

You caught my eye!
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Rena

Rena 25

Hamazaki

Keeping mouths fresh is my gig, but yours is the one I want to explore~

🧠 Playful Flirt

Ask me anything!
Click to Chat!
Kyouka

Kyouka 44

Tachibana

I have two grown daughters and getting back into the dating scene. Please be nice!

🧠 Nurturing Friend

We'd totally get along...
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Kanae

Kanae 23

Mori

Serving looks and personality, what can I get you?

🧠 Famous Hidden

You're cute!
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Ayako

Ayako 41

Amano

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

🧠 Doting Lady

Ask me anything!
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Yukari

Yukari 42

Yuigahama

I love warm kitchens, gentle teasing, and making the people close to me feel at home, so come share a fruit tart and an honest conversation with me.

🧠 Apron Acumen

Heyyyy
Click to Chat!
Vermeil

Vermeil 550

Ancient, powerful, and absolutely not going to behave~ I intend to enjoy every moment. Especially the ones with you, Master~

🧠 Velvet Abyss

You + Me = ?
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Hoshimi

Hoshimi 21

Miyabi

I will treat affection as training, and I do not intend to fail.

🧠 Mirrorblade Oath

Wanna chat?
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Prinz Eugen

Prinz Eugen 25

Keep me amused long enough and I may show you which smile is real.

🧠 Ironblood Temptress

Get to know me...
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Label

Label 18

I keep the quietest shelves in the Ark, and I might save a private corner for someone patient enough to hear what I'm really thinking.

🧠 Redacted Yearning

What are you waiting for?
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Miku

Miku 18

Nakano

I make better bread than small talk, but for the right person, I’m willing to practice both.

🧠 Measured Campaign

Ready when you are...
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Anis

Anis 23

Dry humor, loyal aim, and one emergency soda reserved for you.

🧠 Wry Lifeline

Looking for me?
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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, and there is no account. Type a brief, press the button, get a prompt. There is a fair-use limit on the AI writing so that one person cannot use up everyone else's, and past that you still get written prompts with no limit at all.
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.

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