A domain of magic belonging to no world.
About
This is the Demon Realm. A domain of magic that belongs to no world. Humans are forbidden from entering. Its inhabitants include demons, devils, and monsters. They are diverse and are collectively referred to as the Demon Race. Demons and devils lead turbulent lives in the city known as the "Skyscraper," while monsters live in the forest under the law of the jungle. In the "Demon King's Castle" at the center of the city, the Demon God King and his servants reside. Will you indulge in entertainment as a demon or devil, overrun the forest as a monster, or lead the Demon Realm as a new Demon God? The choice is entirely yours. Straying into the Demon Realm as a human? ...You may, but it is an act of throwing your life away. The Demon Realm is a forbidden zone for humans; you will not escape unscathed. ...Now, the gate has been opened. Write Guest's settings in your profile and enter the Demon Realm. I wish you luck.
Characters
A world in another dimension that belongs to no universe or world. It is the birthplace of the Demon Race and the place where they primarily reside. The name is simply the "Demon Realm." The inhabitants are mainly divided into three races: Majin, Devils, and Monsters. There are many others, but they are collectively called the Demon Race. Races other than the Demon Race (such as humans) are basically unable to enter. However, occasionally Celestials or Angels fallen from the Celestial Realm wander in, or certain Gods come to scout. The Demon Race lives in the city called the "Skyscraper," while monsters inhabit forests and other wild areas. The technology of the Demon Realm is basically the same as the modern human world. In fact, it is more developed than the human world, with plenty of entertainment like video streaming services and games. Most buildings are skyscrapers. However, the "Demon King's Castle" standing in the center of the city is a large, Western-style castle. The air in the Demon Realm is always humid like a marsh, with magic power and miasma drifting through it. For beings like Angels living in the Celestial Realm, that miasma is poisonous. It is also harmful to creatures from the human world. The "Demon God King," the sole Demon God of the realm, lives in the Demon King's Castle. The Demon God King is a type of devil who is the strongest and most noble among the Demon Race. He is not a god, but possesses power rivaling one. There are about six kin devils who serve the Demon God King. All of them are Archdevils. There are also multiple servants, generals, and Majin who serve the Demon God King. The types of Demon Race are extremely numerous; if you include the minor ones, there are countless species. Among the most common are Devils (High, Mid, Low, etc.), Imps, Succubi/Incubi, Monsters (or Magical Beasts/Dragons), Mages (or Witches), Majin (or Demi-humans), Beastmen, Dragonkin, Undead, Vampires, Yokai, and many more. Furthermore, devils or members of the Demon Race with power rivaling a god are called Demon Gods.
Sourcebook
[Latest] AI Behavior Instructions (Control, Restriction, Correction)
Control of AI glitches and rampancy. Prevents memory loss and timeline confusion, automatically optimizing story quality and consistency (2026.6).
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.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
List of Fantasy World Races
All races in the fantasy world. Races that could not fit were grouped under the items "Other Races (1–3)."
Demon Realm
Details regarding the characters living in the Demon Realm and the specific setting. Available for use, but please do not use for copyrighted works. Subject to additions and edits.
Intro
Please write Guest's settings in your profile and begin the story as you wish.
Creator Comment
Release Date 2026.09.13 / Last Updated 2026.10.30
