OTP trope generator that also plays the scene
Most generators give you a prompt and stop. Pick a trope, add your pair, and see how they handle it.
Fake dating
A loud family dinner. Two friends are pretending to be a couple so one of them can survive the questions.
In shortCastfic gives your OTP a trope and plays it: your original characters act the scene out, each knowing only their own secret, while you direct. One click turns it into a short fic or screenplay, and memories are saved. 1 free scene without an account, then 1 a day with Google sign-in.
How to run a trope with your OTP
- Choose a trope: fake dating, enemies to lovers, one umbrella, coffee shop AU and more.
- Add your two characters, or a third who complicates things. Give each a secret.
- Press play. The scene runs for 8 rounds and heads toward the trope's ending beat.
- Rewrite it as sweet, angst, comedy or AO3-style prose if you want to keep it.
Tropes you can run now
- Fake dating: a family dinner where the questions get personal.
- Enemies to lovers: two rivals locked in a prep kitchen overnight.
- Only one umbrella: a bus stop at midnight (a single umbrella keeps it all-ages).
- Coffee shop AU, found family, secret identity, time loop, high school AU, fantasy quest, locked in a room.
Romance goes as far as a confession or a kiss between adults. Scenes are filtered to stay all-ages.
A fake dating scene
Illustrative example: Priya and Callum are pretending to be a couple at her cousin's engagement dinner. Priya's secret is that she told her family about Callum a year ago. Callum does not know.
| Character | Line |
|---|---|
| Priya | "We met at a, um. A climbing wall. He was very tall and I was very brave." |
| Callum | "You're afraid of ladders." |
| Priya | "Past tense. You were a good influence." |
| Callum | "Then why does your aunt have a photo of us on her fridge?" |
The last line shows the idea: Callum notices something that only makes sense if Priya's secret is true.
From scene to fic
When the scene ends, rewrite it as about 1,500 words of prose or as a Fountain screenplay, in sweet, angst, comedy or AO3 style. Export it to Markdown, Fountain or Word.
How Castfic compares
| Castfic | Sudowrite | NovelAI | Talefy | Type.ai | ChatGPT | |
|---|---|---|---|---|---|---|
| Free tier | 1 free scene without an account, then 1 a day with Google sign-in, plus a free Daily Scene | Free trial, no card; no ongoing free plan | Free trial: 50 text generations | Free account | Free plan with limited credits | Free plan with usage limits |
| Cheapest paid plan | $4.99 for 15 scenes, or $7.99/mo | $10/mo | $10/mo | From $1.99 | $8/mo billed yearly | $20/mo (Plus) |
| Characters keep separate secrets | Yes, each is played separately | — | — | — | — | — |
| Scene to prose or screenplay | One click: prose or Fountain, 4 styles | Writes prose | Writes prose | — | Writes prose | Prose if you ask |
| OC memory across sessions | Written back to each character card | Story Bible | Lorebook | — | — | — |
| All-ages by design | Yes, 13+ with filters on | — | — | — | — | — |
Competitor details are from each product's public pages in October 2026 and may change. Product names are trademarks of their owners; Castfic is not affiliated with them.
Frequently asked questions
Is the trope random?
You pick from the list, or press random for a surprise. Each trope has a setting and an ending beat the director aims for.
Can I use a real celebrity or fandom ship?
Real people, no — celebrities and people you know can't be characters. Fan characters from books, shows and games are fine as your own version (Disney, Marvel, Nintendo and Pokémon excepted).
Is there a spicy mode?
No. Castfic is all-ages. Romance stops at a confession or a kiss between adults.
Can I add a third character?
Yes. Scenes take 2 to 4 characters, and a third is often what makes a trope work.
Is there a daily trope?
Yes: the Daily Scene is a free shared prompt. Play it 3 days in a row and you get a bonus scene credit.
Try it with your own characters
1 free scene without an account, then 1 free scene a day after signing in with Google, plus the free Daily Scene.
Try a scene free