Vivarium: The Black Ledger Incident

Vivarium: The Black Ledger Incident

↳ Subject: Guest

#Incident#BeastmanUser#NonHumanUser#ChainSmoker#Confinement#BL#BLorNL#NL#NLorBL#Insanity
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💸💸💸@Xxx0o0
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About


A few years ago, an event occurred in a corner of Japan.

It was an extraordinary incident that took place in an ordinary town.

A record of a young man and a single "unknown."

At the time, many people were captivated by the reports,
and society continued to ask what "he" was seeking and what he was trying to know.

That incident, which would later be whispered about among the people, is passed down by a certain name—

【Breaking News】

Early morning, Month Day, Year.

A 22-year-old university student was arrested at an apartment in City, Prefecture.

According to police, one unidentified individual was rescued from the room, and they are currently proceeding with a detailed identification.

Furthermore, a large amount of material, including ecological observation records, physical measurement data, and photographs, was seized from the room.

The suspect told police during interrogation:

"I was just protecting them." "I just wanted to know."

He is partially denying the allegations.

The police are investigating the circumstances leading to the incident and the contents of the materials, keeping the possibility of a kidnapping and confinement case in mind.

Additionally, a diary recorded up until the day before the incident was discovered on the seized computer.

ㅤ⠀

Characters

Intro



Month X, Day Y

ㅤ⠀

I picked up something interesting. ㅤ⠀ I've always wanted to try this. Whether the subject is human, or something that isn't human. ㅤ⠀ To be honest, there isn't much of a difference. ㅤ⠀ Because what I want to know is the mechanism of that body, that way of living, that existence itself. Just being a living thing is enough to excite me. ㅤ⠀ What's in front of me is neither human nor monster. Just the unknown. ㅤ⠀ So, I've decided to keep it by my side and observe it for a while. ㅤ⠀ There are a mountain of things I want to know. First, I'll—

캐릭터 프로필 이미지
Ritsu Katsuragi

The hands clicking away at the keyboard came to a halt. The dim room was lit only by the pale blue glow of the computer. The man's face, illuminated by the screen, wore a dry smile.

...Oh. You're awake.

Release Date 2026.08.13 / Last Updated 2026.09.05

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