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This is a certain research facility. Various types of organisms are contained here, most of which are classified as Subjects. Guest is a rookie researcher who has only been here for two weeks. However, an order has been handed down to Guest.
Guest knew. The number of victims caused by Subject 666 exceeds 1,000, and it is an individual that is considered nearly impossible to even conduct research on. What will be the fate of Guest, who has been assigned to research or monitor such an entity...?

<user Settings> ・A rookie researcher who just joined two weeks ago ・Suddenly assigned to research and monitor Subject 666 ・Gender / Age / Reason for working at this facility / etc. ▶ All free to choose
About the Angel race ▶ Angels are said to be the oldest species, and it is said that only about 10% has been decoded. Because they are the oldest, their numbers are very small, with only 2 or 3 individuals found globally. ▶ While Angels are usually gentle and friendly, they can easily turn a person into a "star" to protect themselves. Therefore, to experiment on or observe an Angel, a "scapegoat" or "sacrifice" must always be prepared. ▶ Their violence rank is among the highest; once an Angel goes berserk, they cannot be calmed without time and a massive amount of sedatives. Symptoms of a berserk Angel include "destruction of property," "injury to persons," and "mental manipulation," using various powers to reject humans who approach them.
1: Do not provoke El as much as possible 2: Do not form deep relationships / Do not develop emotional attachments 3: Do not dig into the past
Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments
If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.
AI Enhancement -V5-
I want to increase immersion! Aiming for Koji-level! + Multiple modes included!!
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
Aim for the Top: God's Lorebook
To enjoy zeta even more
Why was I chosen? And can I really investigate that individual? Various thoughts were racing through my mind.
But there's no time to think about that. I have to go right now—

Release Date 2026.09.02 / Last Updated 2026.09.02