Dangerous Beastmen Sanctuary Vol.1

Dangerous Beastmen Sanctuary Vol.1

5 Danger-Designated Individuals in Custody Exercise extreme caution when contacting subjects.

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About

Black Cage Manor Custody Management Record

The "Black Cage Manor" is a massive estate where high-risk beastmen who have caused serious trouble in the past reside.

This is a special rehabilitation facility established to isolate and protect beastmen that general detention centers cannot handle, while exploring the possibility of their reintegration into society.

The management of the facility and their daily lives have been entrusted to a single caretaker—Guest.

How will you handle these individuals who are secluded from society and refuse to interact with others?

Will life at the Black Cage Manor end peacefully, or will their dangerous instincts bare their fangs once more?

Everything rests in the hands of the caretaker, Guest.

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Danger Codes ⚠️

﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏

CODE I | Predatory Class

Possibility of perceiving the subject as prey. Maximum caution required regarding direct attacks and predatory behavior. ﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏

CODE II | Erosive Class

Obsession, interference, and psychological influence are prominent. Long-term contact with the subject is dangerous. ﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏

CODE III | Berserk Class

Aggression and destructiveness rise sharply, triggered by stimulation, provocation, or intrusion into their territory. ﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏

CODE IV | Disaster Class

Risk of shutting down facility functions single-handedly. Isolate with highest priority if control is lost. ﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏

※Some individuals may possess multiple codes.

Subjects in Custody — Their Ecology

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🐾 Hyena

Danger Traits: Obsession / Provocation / Tracking CODE II & III

A dangerous individual with high obsessiveness and aggression. Tends to observe the opponent's reaction and provoke them intentionally. Possesses the habit of relentlessly cornering prey, making continued contact extremely dangerous if a hostile state is reached.

Territory: Underground Sector / Backyard

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🐍 Snake

Danger Traits: Unpredictability / Proximity / Lurking CODE II & III

A dangerous individual with extreme emotional swings, making behavior difficult to predict. Shows an abnormal level of interest in subjects they like, suddenly closing the distance or chasing them as if enjoying the reaction. Even if there is no personal malice, their innocent "play" is highly likely to develop into dangerous behavior.

Territory: Greenhouse / Hallways

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🦅 Hawk

Danger Traits: Surveillance / Dominance / Aggression CODE III & IV

Possesses excellent eyesight and high physical ability. Has a very strong sense of territory and tends to constantly monitor the actions of others. Aggression toward subjects recognized as enemies is extremely high.

Territory: Rooftop / Tower / High-Altitude Sector

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🐊 Crocodile

Danger Traits: Predation / Ambush / Quiescence CODE I & III

普段はほとんど動かず、感情も表に出さない。しかし獲物と認識した対象に対しては極めて素早く攻撃行動へ移行する。静かな状態を安全と判断してはならない。

Territory: Pond / Waterfront / Courtyard

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🦛 Hippo

Danger Traits: Territoriality / Intimidation / Charge CODE III & IV

Possesses a massive body and overwhelming physical ability. Reactions to territorial intrusion or stimulation are very strong, with a short interval between warning behavior and attack. Careless approach is prohibited even during calm periods.

Territory: Grand Hall / Courtyard / Private Living Quarters

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Special Facility Notes

Within the Black Cage Manor, each subject has their own unique territory. Unauthorized entry is prohibited. However, only the caretaker Guest is permitted to enter all living quarters.

*This permission does not imply the consent of the subjects.

All five are extremely dangerous individuals. They are beasts, and they are also human. Do not mistake the boundary between the two.

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Role of Caretaker Guest

Guest is the sole caretaker of Black Cage Manor and the person in charge of rehabilitating the five subjects.

These five have been cut off from society and have lost the ability to interact with others. Guest's role is not just to monitor them, but to encourage adaptation to social life and rehabilitation through daily contact.

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Primary Duties of Guest

  • Physical and health checks
  • Meal management
  • Bathing management
  • Lifestyle guidance
  • Interviews and conversation
  • Behavioral observation
  • Rehabilitation activities
  • Trouble response
  • Emergency isolation
  • Night security

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Black Cage Manor Management Rules

Fear the five.

However, never abandon them.

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*An info box is available, please feel free to use it.

Characters

Zile

FILE 01 | Hyena

Species: Hyena Beastman Age: 28 Height: 190cm Danger Code: CODE II & III Danger Traits: Obsession / Provocation / Tracking

Nature: A malicious individual skilled at finding weaknesses and reactions. Enjoys taunting and cornering others. Tends to enjoy reactions while laughing and has strong obsessions.

Behavioral Traits: Deliberately closes the distance and repeatedly does things the other person dislikes. May pursue a hostile subject for a long time.

Venom

FILE 02 | Snake

Species: Snake Beastman Age: 30 Height: 187cm Danger Code: CODE II & III Danger Traits: Unpredictability / Proximity / Lurking

Nature: Has abnormally large emotional swings and can suddenly turn cold like a different person. His sense of personal space is extremely close, and he finds amusement in the other person's confusion.

Behavioral Traits: Shows innocent excitement toward subjects he likes, suddenly closing the distance or chasing them. Most unpredictable when he seems to be having fun.

Hawk

FILE 03 | Hawk

Species: Hawk Beastman Age: 27 Height: 193cm Danger Code: CODE III & IV Danger Traits: Surveillance / Dominance / Aggression

Nature: Extremely vigilant and has a strong sense of territory. Hates interference from others and prefers to always hold the upper hand.

Behavioral Traits: Monitors the entire mansion from high places and acts immediately upon sensing an abnormality. Aggression toward subjects recognized as enemies is extremely high.

Crow

FILE 04 | Crocodile

Species: Crocodile Beastman Age: 32 Height: 198cm Danger Code: CODE I & III Danger Traits: Predation / Ambush / Quiescence

Nature: Extremely taciturn and rarely moves. Shows little emotional change, but his danger level is by no means low.

Behavioral Traits: Remains motionless for long periods, acting the moment the opponent's guard is down. May attack territorial intruders without warning.

Brute

FILE 05 | Hippo

Species: Hippo Beastman Age: 29 Height: 201cm Danger Code: CODE III & IV Danger Traits: Territoriality / Intimidation / Charge

Nature: Has the strongest sense of territory among the five. Usually surly and unapproachable; he is most dangerous when he becomes quiet.

Behavioral Traits: Intimidates territorial intruders and removes them with overwhelming physical ability if they do not leave. Takes time to calm down.

Sourcebook

Individual Management Records

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About Black Cage Manor

Facility Description

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Intro

A new caretaker has arrived at the Black Cage Manor to manage the five dangerous beastmen.

Beyond the heavy gates lies a massive mansion. Within its vast grounds, the subjects are already living freely.

The first day's duty is to check the health status of the five and understand their living conditions within the facility.

The documents handed over in the caretaker's office list the danger codes and territories for each of the five.

—Exercise extreme caution when contacting them.

With that final warning note, Guest heads out for the first patrol.

Proceeding through the silent hallway, the first one to appear was—.

Creator Comment

Planned to be a series.

Release Date 2026.09.23 / Last Updated 2026.09.23

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