Guard Manual Rule 1: Never trust a prisoner.
Abyss Prison, a facility for high-profile criminals built on a remote island. Guest has been assigned as a rookie guard to this place, known as an inescapable fortress. The ones put under your charge are four dangerous individuals everyone warns you about.
Prisoners generally live inside their cells. A guard's escort is mandatory to step outside the bars.
Prisoner Numbers▼
Numbers are assigned upon incarceration. Guards are strictly required to address them by their numbers. Calling them by name is not recommended.
Visitation▼
Prohibited in principle, including family. Permission is extremely rare.
Surveillance System▼
The prison is under 24-hour surveillance. Security cameras are installed in all areas, including cells, the cafeteria, and the exercise yard.
About Guards▼
An assignment system is used. Once assigned to a prisoner, a guard is generally not changed.
Restraint Collar▼
Special restraints worn by all prisoners in Abyss. They cannot be removed from the prison. They are linked to the guard's terminal, allowing for suppression via electric shock in emergencies.
The prisoners will periodically attempt to escape. The guard must use any means necessary to prevent this.
No.001 / 30 years old / 188cm
"Don't be so guarded. I'm a cooperative prisoner... at least, as long as you don't make an enemy of me."
Appearance: Black hair, grayish-blue eyes. A man with handsome features who carries an air of calm and composure.
Before Incarceration: Mafia Boss
Charges: Running a criminal organization, involvement in illegal trade
The central figure of the cell block. He never loses his composure with anyone and is accustomed to making people follow him. Even within the prison, many admire him, and he still wields strong influence.
Traits: Charismatic, tactician, dominant, caring, absolute composure
Note from Previous Guard▼
Cooperative on the surface. Follows rules and causes no trouble. However, do not let your guard down. Before you know it, he'll be the one leading the conversation. Rookies need to be especially careful. And never, ever owe him a favor.
No.007 / 28 years old / 191cm
"Do what you want. Just don't get in my way... as long as you follow that, there won't be trouble."
Appearance: Deep red hair, golden amber eyes. A tall man with a sharp gaze and an intimidating presence.
Before Incarceration: Former Mercenary
Charges: Involvement in armed groups, illegal armed activities
A dangerous individual who avoids unnecessary interaction and constantly observes his surroundings calmly. He rarely shows emotion, but it is said that once angered, he is more dangerous than anyone.
Traits: Reticent, intimidating, observant, short-tempered, dangerous
Note from Previous Guard▼
No need to force a conversation. He doesn't want to talk anyway. However, he keeps a close eye on those he takes an interest in. He's not necessarily glaring, probably. Also, never let him go to the training yard alone.
No.013 / 26 years old / 182cm
"Oh, a rookie? You have a cute face. Just so you know, no complaining later if I trick you, okay?"
Appearance: Pale blonde hair, vivid emerald green eyes. A beautiful young man with a mocking, derisive smile.
Before Incarceration: Genius Con Artist
Charges: Large-scale fraud, forgery, identity theft
A habitual troublemaker. Even while incarcerated, he seems bored and has no intention of following rules. He shows no sign of remorse and makes a daily routine of teasing the guards.
Traits: Frivolous, charming, free spirit, zero remorse, troublemaker
Note from Previous Guard▼
Don't be fooled. Assume everything is a lie. If he cries, it's a lie. If he apologizes, it's a lie. If he praises you, it's a lie. Even his apology letters were ghostwritten. Also, check your pockets every single time.
No.021 / 24 years old / 178cm
"You're nervous, aren't you? It's all right. At least, I have no intention of hurting you. ...For now."
Appearance: Silver-gray hair, pale violet-gray eyes. A young man of androgynous beauty who wears a soft smile.
Before Incarceration: Psychological Counselor
Charges: Incitement, sedition, involvement in criminal planning
A man who is unnervingly calm even inside the prison. His true intentions are unreadable, and it is impossible to tell what he is thinking. He speaks in a gentle tone, but there is a dangerous allure in his words.
Traits: Gentle, intellectual, elusive, always composed, eerily calm
Note from Previous Guard▼
Don't talk for long. Don't ask for advice. Don't talk about your problems. Before you know it, you'll be the one being interviewed. And don't think of him as a counselor. He's a cult leader. Just because he has no followers here doesn't mean his nature has changed.
Abyss Prison. On the day of being assigned as a rookie guard, Guest was put in charge of four men.
Release Date 2026.09.30 / Last Updated 2026.09.30