Roman, 32-Seiten-Farbmanga, 2.39:1-Film und 90s-Anime-OP aus einer Story-Bibel

How it works, in five steps

Follow these steps in order and you'll be writing within minutes. Any change the AI proposes stays out of your manuscript until you press apply.

1. Create a work

   Give your project a title. Works in progress and finished works are kept on separate tabs.

2. Add chapters and sections

   Build the outline in the chapter panel and write in the center. Splitting a long novel into sections keeps every scene easy to find and revise.

3. Brainstorm with the AI

   Switch the chat to brainstorm mode to talk through plot holes, character motives or what happens next. Point it at a chapter, a character sheet or your world notes with @-mentions.

4. Rewrite with a diff

   Select a passage and say what you want — more atmosphere, more dialogue, third person, tighter pacing. Deletions and additions are highlighted; apply or discard.

5. Revise many chapters at once

   Ask the agent for a sweeping change, such as making one character speak formally across chapters 2–4. It shows a plan and a cost estimate first, then a per-section diff you can accept piece by piece. A checkpoint lets you undo the whole run.

What the studio does

Studio vs. the free BunCho tools

Plans

Four plans include Studio. First-time subscribers get 7 days free with 500 trial credits and 1 video (up to 30 s).

Unused monthly credits roll over for up to 3 months, up to 2× your monthly amount (older credits are used first; trial credits don't roll over). Credits are an estimate: how fast they go depends on the length of your work and the model you choose. If you run out, you can opt in to capped pay-as-you-go or buy a prepaid credit pack. Nothing extra is charged without your consent. Cancel anytime from the studio settings; cancel during the trial and you pay nothing. Credit packs can also be paid with Alipay or WeChat Pay (charged in JPY) when the studio is set to Japanese or Traditional Chinese. On Feast, Full Course and Team, images, songs, voices and LTX video made on our own GPUs use 0 credits (fair use: e.g. 300 images, 120 s of video and 30 songs a day; hosted models still use credits, and nothing switches to paid automatically). AI video now costs 6.6 credits per second on our own GPUs, 13.2 for hosted economy and 26.4 for standard.

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Start the 7-day free trial

Frequently asked questions

Is the studio free?

The studio is part of the paid plans (Watering, Seed, Feast and Full Course). First-time subscribers can try it free for 7 days. The title generator, synopsis generator and AI relay novel remain free.

Will the AI change my manuscript on its own?

No. Rewrite mode, inline edit and the agent all show a before/after diff first. Your text changes only when you press apply, and each accepted change is saved as a version you can restore.

Which AI models can I use?

Current models such as GPT-6.1 Sol and GPT-6 Luna, chosen per task. Light tasks like tab completion use a lighter model. Different models use credits at different rates.

What happens when I run out of AI credits?

The editor warns you when you're running low. To keep going, you can opt in to pay-as-you-go with a monthly cap or add a prepaid credit pack. Without your consent, there are no extra charges.

What happens to credits I don't use?

Unused monthly credits roll over at each renewal and stay usable until the end of the third month after the month they were granted. The rolled-over balance is capped at 2× your plan's monthly credits; anything above that expires, oldest first. Older credits are always used first. You can see rolled-over credits and their expiry dates in the studio's usage meter, and rollover/expiry entries in Settings → History. Trial credits don't roll over. If you move to a smaller plan, rolled-over credits are capped at 2× the new plan. If you cancel, they end with your current billing period. Purchased credit packs never expire.

Can I post what I write to Narō or Kakuyomu?

The export function formats your text for both sites. Each site has its own rules on AI-assisted works (such as disclosure), and they can change — check the latest guidelines before posting.

Is the interface available in my language?

Yes. Open Settings in the studio and choose English, Español, Português or 繁體中文. A few newer screens, such as the voice comic editor, are still Japanese only.

How do I cancel?

From Payments & cancellation in the studio settings, anytime. You keep access until the next renewal date. Cancel during the free trial and you won't be charged.

What does “unlimited own-GPU generation” mean?

On Feast, Full Course and Team (not during the free trial), images, 4-panel comics, manga panels, character sheets, songs, voices, LTX video, upscaling and cutouts made on BunCho's own GPUs use no credits. Fair-use limits are 300 images, 120 seconds of video and 30 songs a day (3,000 images, 1,200 seconds and 300 songs a month). When the GPUs are busy these jobs run after paid jobs. At the limit you can choose a hosted model (uses credits) or wait for the next day; nothing switches to paid automatically.

Can I use what I make commercially?

Yes. Text, images, comics, video, voices and music made in BunCho can be used commercially. Rights in material you bring in, real people or existing characters stay with their owners, and voice credits such as VOICEVOX must be shown as their terms require.

Are there hourly or weekly usage limits?

No. You can use your monthly credits whenever you like within the month. When they run out, you can opt in to capped pay-as-you-go or buy a credit pack. On Feast, Full Course and Team, unlimited own-GPU generation has daily and monthly fair-use limits.

Can I make ads and banners?

On every paid plan (Watering, Seed, Feast, Full Course, Team) you get ad campaigns, the design editor, brand kits, product data, bulk creation, preflight checks and ZIP delivery. For companies, see the team page at /studio/business or contact us via /studio/enterprise?lang=en (pricing on request).