Cursor for stories
An AI screenplay editor that checks continuity, with Fountain and FDX
BunCho's Story OS manages scripts for drama, anime and vertical series together with their canon: who knows what and when, foreshadowing, props, costumes and injuries. Change a fact and it finds the affected scenes and proposes fixes; export to Fountain or FDX (Final Draft). Free tools convert script formats and estimate scene runtime.
The analogy: code and stories
| Area | Code (Cursor) | Stories (BunCho) |
|---|---|---|
| Script format | Final Draft: the industry-standard FDX format with automatic formatting | Japanese scenario format ↔ Fountain conversion; FDX and Fountain export |
| Structure | Final Draft: Beat Board, Outline Editor, Structure Lines | Story Graph per scene: facts, foreshadowing, props, costume, injuries |
| Revisions | Final Draft: tracked revisions and comments | Accept Story Refactoring diffs one by one; checkpoints |
| Production | Celtx: production planning and team plans | Storyboards and video (regenerate only the shots that changed) |
| AI continuity checks | No AI mentioned on Final Draft's product page | Story Tests (knowing too early, appearing after an exit, continuity) |
| Price (official) | Final Draft 13 $199.99 one-time, or $99.99/yr or $16.99/mo | 7-day free trial of the Studio |
When Final Draft / Celtx is the better choice
To be fair: if these matter most to you, Final Draft / Celtx is a strong choice.
- Final Draft: the industry-standard FDX format and production habits built around it
- Celtx: production planning and team management
- One-time purchase and offline use (Final Draft)
What BunCho does differently
- Story Refactoring (find what a change breaks)Change a fact in plain words (“Mina is actually his sister”). BunCho finds the affected scenes across the whole work and proposes edits as diffs. Accept them one by one; a checkpoint is made before anything is applied.
- Story Tests (continuity and foreshadowing)Free rule-based checks for timeline and causality, characters knowing things too early, motivation, foreshadowing set-up and payoff, continuity after exits and of costume, injuries and props, and first-person drift.
- From novel to manga, video, songs and playable storiesKeep the same characters and facts while turning the story into manga (with Japanese vertical lettering, ruby and kinsoku), video, songs with music videos, playable stories and audio dramas.
- Japanese typesetting and posting formatsVertical EPUB with ruby, export formats for Japanese web-novel sites, DOCX, TXT and Markdown. Scripts also export to Fountain and FDX.
Getting started
- Bring a Final Draft .fdx, a .fountain file or Japanese scenario text into the free importer below. Scenes become sections and speakers become characters.
- Use the free script converter for Japanese scenario ↔ Fountain ↔ FDX.
- Estimate runtime per scene with the scene runtime calculator.
- “Save to BunCho” and run Story Tests for continuity (saving needs a login).
FAQ
Does it support the Japanese scenario format?
Yes: 柱 (○place (time)), ト書き and Name「line」 are read and written, and converted to and from Fountain.
Can it read Final Draft files?
It reads FDX paragraph types (scene heading, action, character, dialogue, parenthetical, transition). Detailed formatting and comments do not transfer.
Is importing free?
Converting and backup are free with no account; saving needs a login.
More comparisons
Cursor for writers · Sudowrite alternative · Novelcrafter alternative · NovelAI alternative · AI Novelist alternative · Nola alternative
Sources (checked 2026-10-12): Final Draft / Final Draft 13 Release Notes / Final Draft: File management (FDX) / Celtx Pricing / Fountain syntax. Information about other products summarises their official pages on that date and may differ by plan or region or change later; check their official pages for the latest. "Not found on the official pages" does not mean the feature does not exist. BunCho is independent and not affiliated with or endorsed by the companies named. Product names are trademarks of their owners. 日本語