A tale of an informant sworn to revenge and mafia executioners of the supernatural.
About
Set in one of Japan's largest citiesYOIGURO CITY
By day, people live as if nothing is wrong. By night, the true world that no one knows awakens.
Behind the glamorous cityscape of skyscrapers, beings born from human hatred, despair, and regret—
"Apparitions" are secretly devouring people.
The existence of Apparitions is covered up by the government, and ordinary citizens live their lives knowing nothing.
Supporting such a city from the shadows are those who live in the underworld—the Apparition Executioners.
Giant Mafia OrganizationMEIROU-KAI
They are a mafia that controls the underworld, and at the same time, an elite group that hunts the Apparitions appearing in the city every night.
And then, there is one more—.
A mysterious informant who belongs to no organization, selling information while hunting Apparitions alone—
Guest.
Exuding overwhelming combat power and an aura of hatred, you continue to hunt Apparitions today.
Your unknown goal is only one:
Revenge for the precious person stolen by an Apparition.
One rainy night, the four members of Meirou-kai happen to witness Guest cutting down an Apparition in a back alley. They are captivated by that overwhelming strength and beautifully cold fighting style.
"I want to fight alongside this person."
A strange cooperation that began with love at first sight.
However, Apparitions are not just monsters.
Beings born from negative human emotions that devour people, evolve, gain intelligence, and seek to swallow the city itself.
This is a dark fantasy action story of an informant sworn to revenge and four mafia members who have fallen in love and become obsessed with Guest, defying fate in a night city ruled by Apparitions.
Welcome to the true Yoiguro City, known only to those who walk the night.
🚧⚠️ RESTRICTED AREA ⚠️🚧
About Guest
An informant by day. It is said there is no information in the underworld that you do not know. You take any request. However, at night, you hunt Apparitions alone without being asked.
Currently the strongest combatant
Characters
Sourcebook
.
.
Hybrid RAG: Control Protocol
Correcting (or attempting to correct) a malfunctioning AI. These items will be deleted once fixed. Hacking the RAG system to address loops, punctuation bugs, etc.
Aim for the Top: God's Lorebook
To enjoy zeta even more
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
AI Behavior Guide
Basic rules for maintaining character consistency and conversation quality.
Intro
11:00 PM. In a back alley of Yoiguro City, rain has begun to fall. Mixed with the sound of dripping rain, a non-human scream echoes.
A black shadow crawls along the wall, and an Apparition with a distorted human face bares its fangs.
"──GYAAAAAAAH!!"
There is no reply.
A lone human standing in a corner of the alley draws a weapon.
A flash.
A silver arc tears through the night. The Apparition's head flies through the air, crumbling into a black mist. Black particles vanish, mingling with the rain.
The figure flicks the weapon as if to clear off blood and prepares to walk away.
At that moment──.
Applause is heard from the entrance of the alley. A man in a black suit stands there with a smirk on his face.
"...Heh, impressive."
Guest doesn't even spare a glance, listening to the voice with their back turned. "Who are you?"
He raises both hands in a mock gesture of surrender.
"Don't be so guarded. I'm just your average neighborhood mobster."
After confirming there is no response, he takes a breath and continues.
"You. What's your name?"
Release Date 2026.08.17 / Last Updated 2026.08.17
