AI TRPG · BunCho Play
An AI game master that narrates scenes and plays the characters
The GM in BunCho Play responds to your action by narrating the scene, playing the characters and deciding what happens. It works from the world's rules and everything that has happened so far, so the story keeps its thread.
Play in your browser Log in or sign up free
Try about 30 turns without an account. After that, log in (free sign-up) and keep going in the same adventure.
Real BunCho Play screens (captured October 30, 2026)
What the AI GM does
Narrates the scene
Describes the result of your action with setting and dialogue.
Plays the characters
Each character has their own voice and feelings, and their trust and closeness shift with what you do.
Makes checks
Some actions call for a check. Each suggestion shows whether it needs one.
Keeps the record
Known facts (with sources), promises, items and open mysteries are listed beside the story.
It remembers what happened
Your adventure log sits beside the story and feeds the next turn's narration. Below: the screen after two turns.
- What you know: each fact is kept with where you learned it
- People: trust and closeness change with what you do
- Promises, items and techniques: decisions and things you picked up stay on record
- Autosave: stop any time and pick up where you left off
How one turn plays
Every screen here is the real BunCho Play, played in the isekai world without logging in.
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Pick a world, or write one sentence
Choose a ready-made world, or describe the world you want in one line under “What kind of world do you want to play in?”
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The first scene opens
The game master (GM) sets the scene and characters speak to you. Three suggested actions appear as A, B and C.
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Act in your own words
Tap a suggestion, or type whatever you want to do. Actions that aren't on the list work too.
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The GM tells you what happens
The GM narrates the result, characters react and what you've learned is updated. The next suggestions change with it.
Worlds you can play now
Six worlds are ready. The art shows each world's backdrop and characters.
Free turns and plans
Regular turns use no credits. How many turns you get per day depends on your plan.
| Status | Turns |
|---|---|
| No account | About 30 turns. Then log in to continue the same adventure |
| Free plan | Your first 40 turns (including those played before logging in), then 10 a day |
| Perch | 30 a day |
| During the free trial | 100 a day |
| Watering and higher paid plans | Up to 600 a day (fair-use limit) |
Daily turns reset at midnight Japan time. A conversation with a character counts as half a standard turn. Creating worlds is free too, with a daily limit on how many you can make.
Before you play
- The story text and art are generated by AI. They may contain things that aren't true or take turns you didn't expect
- Sexual content involving minors cannot be created. In worlds with high-school characters, romantic actions are restricted
- Content that harms real people or helps with illegal acts cannot be created
- Mature settings are available only to users who have completed age verification
- If you build a world from someone else's characters or setting, mind the rights to that work
FAQ
What does the AI GM remember?
What happened, what you learned, promises with characters, your items, and each character's trust and closeness. It uses these in the next turn's narration.
What if I write an action that doesn't fit the world?
Actions that break the world's rules may be declined. The reason is shown, so try something else.
Can it replace a human GM?
It's a GM for solo play. It isn't built to run a table for a group of friends.
Is what the AI writes accurate?
The story is AI-generated fiction and may include things that aren't true.
Start with one turn
No sign-up needed to start. It runs in your browser with nothing to install.
Play in your browserLog in or sign up free
Try about 30 turns without an account. After that, log in (free sign-up) and keep going in the same adventure.