AI Collaborative World Building
Bungo Stray Dogs: Yokohama
A complete world generated by AI from a single sentence of "Bungo Stray Dogs" — 75 atoms, multiple games, art assets. The world is not the end point, but the starting point of all creation.
Yokohama, a port city where ability users and ordinary people coexist. Every ability is named after a literary work, every ability user must register with the government or be hunted. The city is divided among three powers: the Armed Detective Agency handles supernatural cases the police cannot touch,
When the foreign organization The Guild descends on Yokohama with limitless wealth and a flying fortress, when Fyodor Dostoevsky plots in the shadows to purge all ability users — the city's balance needs only a single spark to collapse.
Visual style: cel shading, sharp shadows, flat colors. Kimi K3 Claude Opus 5
23 characters generated from a single sentence of "Bungo Stray Dogs", each with independent backstory, personality, and ability binding. The three sprites below were auto-generated by GPT Image 2 with backgrounds removed.
Atsushi Nakajima — White Tiger ability
Osamu Dazai — No Longer Human
Ryunosuke Akutagawa — Rashomon
Characters
Atsushi Nakajima
Orphan-turned detective agency member. The White Tiger ability forces him to choose what kind of person power makes him.
Characters
Osamu Dazai
Smiling agency member, former mafia executive. His touch nullifies any ability. He seeks a painless death.
Characters
Doppo Kunikida
Idealist with a notebook that manifests written objects. Fiercely principled, Dazai's reluctant partner.
Characters
Ryunosuke Akutagawa
Port Mafia assassin. Rashomon transforms his coat into razor-sharp lethal shadows.
Characters
Chuuya Nakahara
Port Mafia executive. Gravity manipulation incarnate, a volatile fighter loyal to few.
Characters
Mori Ogai
Port Mafia boss. A doctor who rules with calculated necessity, claiming to prevent deeper chaos.
Characters
Fitzgerald
Guild leader. Turns wealth into power, treating nations as line items on a balance sheet.
Characters
Ranpo Edogawa
The agency's greatest detective. Needs no ability — his deduction alone solves the unsolvable.
Characters
Fyodor Dostoevsky
Rats in the House of the Dead leader. A chessmaster of manipulation who views humans as equations.
Characters
Akiko Yosano
Agency healer. Her ability reverses fatal wounds — but only on those near death.
Characters
Izumi Kyouka
Young assassin turned agency member. Snow-based ability, haunted by her past.
Characters
Fukuzawa Yukichi
Armed Detective Agency president. His ability enforces order through unwavering principle.
Characters
Ozaki Kouyou
Port Mafia executive. Controls snow and protects her subordinates fiercely.
+Create More CharactersLocations
Yokohama Harbor
The city's lifeblood artery, where ships, warehouses, and night fog interweave — legal trade and criminal empires share the same water.
Locations
Suribachi City Ruins
A bowl-shaped crater left by an old catastrophe, home to outcasts and the desperate at Yokohama's edge.
Locations
Guild Skybase
A floating fortress of wealth and foreign power, from which The Guild looks down on Yokohama as a trophy.
Locations
Cafe Uzumaki
A quiet café below the detective agency, where detectives plan, argue, and pretend to be ordinary people.
Locations
Bar Lupin
A dim bar forever linked to the old mafia trio, where past sins are toasted in low light.
Locations
Moby Dick
A massive airborne vessel, headquarters of The Guild during their assault on Yokohama.
Locations
Port Mafia Headquarters
A towering black high-rise that shadows the harbor — the nerve center of Yokohama's dominant criminal empire.
Locations
Yokohama Waterfront
Container yards, warehouses, and floodlit docks — where mafia cargo lands and where most of the city's ability battles actually take place.
+Create More LocationsThe Tiger and the River
A starving, hunted Atsushi is pulled from the brink of death into the Armed Detective Agency's war for Yokohama's soul.
Azure King's Bombing Plot
Terrorists seeking pure justice force the agency to confront how easily ideals become massacre.
The Guild Descends on Yokohama
A wealthy North American ability organization arrives, intent on seizing the city and the ability secrets buried within.
Three-Way War
The Agency, Mafia, and Guild collide in open conflict, turning Yokohama into a chessboard for ability users.
The Tripartite Framework
After mutual destruction, Yokohama's major powers formally sign an uneasy peace to prevent total collapse.
Cannibalism Virus Crisis
A death-condition ability binds the lives of the Agency president and Mafia boss, turning leadership itself into a ticking weapon.
Decay of Angels
An ability-user terror conspiracy begins rewriting evidence, aiming to frame the agency as criminals.
The Arahabaki Incident
An experimental ability is unleashed in central Yokohama, leaving a crater where a block once was and a red-haired survivor.
Dragon's Head Conflict
A three-way gang war for the unclaimed Yokohama underworld, burning entire blocks and elevating the Mafia to the city's dominant force.
Dazai's Defection
The mafia's youngest executive left the organization after the only friend who told him to live died.
Factions
Armed Detective Agency
A licensed detective agency of ability users, protecting Yokohama through investigation, combat, and stubborn ideals.
Factions
Port Mafia
Yokohama's dominant criminal empire, ruled by Mori through necessary darkness to prevent deeper chaos.
Factions
The Guild
A wealthy North American ability organization that treats nations and people as balance sheet entries.
Abilities
No Longer Human
Dazai's ability. Nullifies any supernatural power on touch — the perfect counter and the perfect curse.
Abilities
Beast Beneath the Moonlight
Atsushi's ability. Transforms him into the White Tiger, granting fearsome strength and regeneration.
Abilities
Rashomon
Akutagawa's ability. Transforms his coat into razor-sharp shadows that can cut through anything.
World Rules
Ability Users
Individuals born or awakened with supernatural gifts, each ability named after a literary work, shaped by the user's nature. All must register with the government or be hunted.
Literary Naming
Every major ability bears the title of a literary work, binding real-world literary heritage to battlefield mythology.
Ten works have been generated from this world — 6 character sprites (with expression variants), 4 scene backgrounds and title art, 2 BGM tracks, and 1 playable visual novel game. The world is the source; works are its branches.
ADA Mission: Harbor Ghost — playable visual novel
Title Background — Yokohama Night
This world is public. You can Fork it — inherit all 64 atoms, all characters and scenes, rewrite what you want, and publish your own version.
Remove Dazai, add your OC. Replace Yokohama with Tokyo. Swap cel shading for watercolor. The world is your asset library — rewriting is creation.
Collaborative workflow
Fork world → Edit atom cards → Generate new games/videos/assets → Publish → Others can Fork your version
Every Fork is a branch. Worlds grow through branching — there is no single canon, only infinite variants.
World building · TextKimi K3Claude Opus 5Grok 4.5
One sentence → 64 atoms: characters, locations, events, factions, abilities, rules.
Art generation · ImageGPT Image 2Gemini 3.1
Character sprites (auto background-removed), scene backgrounds, game covers.
Video generation · AnimationSeedanceKling 2.5
Title animations, character entrance effects, scene transitions.
In-game dialogue · Real-time narrativeDeepSeek V3Kimi K3
Real-time LLM generates narrative in character voice. Freely switchable.
In Neta Studio, a world is the beginning of everything. A world contains characters, locations, events, factions, and ability systems — all generated by AI from a single sentence, all referenceable, rewritable, and expandable.
A world is not a game, a video or an image. A world is the source of all of these: from the same world, you can generate visual novel games, character sprites, scene backgrounds, video animations — each inheriting the same worldview, the same settings, the same conflict.
World → Game
Select a storyline from world cards, AI auto-writes game logic, generates art, builds a playable visual novel.
World → Video
Generate dynamic videos from world characters and scenes — title animations, character entrances, scene transitions.
World → Assets
Each character auto-generates a sprite, each location auto-generates a background. The world itself is an asset library.
Create from this World
Inherit 64 atoms, rewrite what you want, create your own Yokohama.
World: Bungo Stray Dogs: YokohamaAtoms: 64 (Characters 23 · Locations 13 · Events 16 · Factions 4 · Abilities 5 · Rules 2)Works: 10 (Game 1 · Sprites 6 · Backgrounds 3)Models: Kimi K3 · Claude Opus 5 · GPT Image 2 · DeepSeek V3
