3rd Place
MangstoonAI
Webtoon creation is gatekept by a $60K+ cost and 100+ hours of manual work per pilot — only 12,000 artists in Korea can do it.
Core trick
Gemini generates a 30-panel storyboard from a three-sentence brief, and each panel is re-edited through a natural-language instruction on that image.
Tags
Description
Webtoon creation is gatekept by a $60K+ cost and 100+ hours of manual work per pilot — only 12,000 artists in Korea can do it. MangstoonAI democratizes webtoon creation with Gemini: describe your story in 3 sentences, pick an art style, and get a full 30-panel storyboard generated in minutes. Every panel is editable with natural language — no artistic skills required.
README excerpt
# MangstoonAI — AI Webtoon Generator
> **3rd Place — Gemini 3 Seoul Hackathon (Feb 28, 2026) — $20,000 Google Cloud Credits**
Turn your wildest fantasy into a full webtoon — starring yourself — in under a minute.
[](https://youtu.be/L9gxk6dSrbw)
**[Watch the demo →](https://youtu.be/L9gxk6dSrbw)**
---
## What is 망상?
In Korean, **망상** (mangstoon) means your wildest, most embarrassing fantasy — the one you replay in your head but would never tell anyone.
MangstoonAI turns that into a scroll-style Korean webtoon. Type your story, upload a selfie, pick an art style, and watch as AI generates a 20+ panel webtoon where **you** are the main character. Then edit any panel with natural language.
---
## How It Works
```
[Story Text + Selfie]
│
▼
[decompose_story] → 22-panel storyboard (5-act structure, JSON)
│ characters, scenes, dialogue, camera angles, mood
▼
[generate_panel × 22] → all panels in parallel:
│ 1. Flash optimizes image prompt
│ 2. Flash Image generates 9:16 panel
▼
[Webtoon Output] → 22 panels in scroll format + speech bubbles
│
▼
[Edit] → "5번 패널 배경을 한강으로" → regenerates just that panel
```
---
## 4 Art Styles
| Style | Best For |
|-------|----------|
| **K-Webtoon** (default) | Romance, slice-of-life, comedy |
| **Anime** | Action, shōnen/shōjo |
| **Comic** | Superhero, sci-fi, noir |
|