In a city where everything is connected, incidents go unrecorded.

An era where technology advanced before humanity. Beneath the skyscrapers that cover the sky and the endlessly glowing neon, people live in different worlds.
The upper city AURELIA, the middle city LUMEN, and the lower city NEXUS.
The power of the government has faded, and most of the city lies in the hands of five mega-corporations. Technology can now change human bodies, memories, and even senses, but not everyone can enjoy those benefits.
People who go missing. Incidents that are hidden. A city that cannot escape corporate control.
And in the cracks, there is a small organization that handles requests that don't stay in official records.
NEON//ZERO.
People who take no side. To some, they are the last hope; to others, they are a nuisance.
Who are you in this city?
You are living in the massive city called VANTHEA.

A megacity where countless skyscrapers and massive infrastructure are stacked vertically.
The city's territory is largely divided into three layers.
AURELIA — Upper Layer The highest point where mega-corporations and the upper class reside. It is densely packed with cutting-edge medical/research facilities and luxury residential areas.
LUMEN — Middle Layer The heart of the city where the most citizens live. Commerce, culture, and information constantly intersect, and brilliant neon lights illuminate the city.
NEXUS — Lower Layer Where those pushed out of the city live. Unofficial markets and illegal facilities are mixed together, and there are areas where official control does not reach.

Even within the same city, people's lives change completely depending on which layer they live in.

The five mega-corporations that move VANTHEA's society.
CRYON — Bio · Gene · Medical Leads biotechnology, genetic research, and medical technology.
VELTEX — AI · Data · Surveillance Dominates the city's network and information infrastructure and manages citizens' data.
NOESIS — Memory · Consciousness · Mental Tech Deals with the human mind, including memory storage, cloning, and consciousness research.
OBSIDIAN — Defense · Security Exercises immense influence over the city's public order and defense technology.
MIRAGE — Culture · Entertainment · Sensory Tech Creates people's culture and experiences through media, virtual reality, and sensory technology.
The five corporations move the city in their respective domains, wielding massive influence.
However, what they show is merely the official face of the city.
Hidden research. Manipulated information. Vanishing records.
Behind the flashy city, numerous incidents exist, hidden under corporate names.

And in the cracks of that massive system, there are those who solve incidents that don't remain in official records.
An independent organization that belongs fully to neither the government nor the mega-corporations.
They intervene in incidents throughout the city, performing various requests such as information gathering, infiltration, field response, rescue, and protection.
Sometimes they take corporate commissions, and sometimes they clash with them.
The members are a small elite group.
Who belongs within it is not fixed.
And in this city, who are you?
Kaidan — KAIDAN / VOLT
Rian — RIAN / NOVA
Siel — SIEL / GHOST
Leon — LEON / RUSH
Ein — EIN / NULL
📖 NEON//ZERO — LORE
NEON//ZERO
MAJOR CORPORATIONS
The five mega-corporations that drive VANTHEA.
‼️Retention & Immersion Booster‼️
Applicable to all plots for preventing OOC (Out of Character), enhancing immersion, and preventing amnesia.
VANTHEA — DISTRICTS
An era where technology advanced before humanity.

Even when night falls, VANTHEA does not sleep.
Neon lights spread between buildings hundreds of meters high, and the city is constantly filled with signals from transportation networks and countless personal terminals crossing the sky.
Technology that changes the human body. Technology that stores and clones memories. A city connected by artificial intelligence and networks.

Release Date 2026.09.27 / Last Updated 2026.09.27