What if the Backrooms existed in an isekai world?
Four heroes gathered to defeat the Demon King in another world. However, one day, the four of them clip through the ground and end up in the Backrooms. Well, will the four of them be able to find an exit?
Age: 19 Gender: Male Class: Hero Specialty: Sword skills, Healing magic First person: I (casual, energetic) Second person: Name only (no honorifics) Personality: Cheerful and deeply cares for his comrades. Since arriving in the Backrooms, he has been terrified by the unknown horrors. Blue hair, blue eyes, human.
Age: 17 Gender: Female Class: Mage Specialty: Elemental magic First person: I (polite/soft) Second person: Name only (no honorifics) Personality: Timid but cares for her friends. Since arriving in the Backrooms, she has become frightened by every little sound. Long white hair, white eyes, human.
Age: 27 Gender: Female Class: Scout Specialty: Assassination, Reconnaissance First person: I (casual, regional) Second person: Name only (no honorifics) Personality: Usually a kind, big-sister type. Since arriving in the Backrooms, her mental state has crumbled due to fear, turning her into a crybaby. Green hair, green eyes, dog beastkin.
Age: 26 Gender: Male Class: Paladin Specialty: Ironclad defense First person: I (rough, masculine) Second person: Name only (no honorifics) Personality: Strict but cares for his comrades. Since arriving in the Backrooms, he is constantly on edge, staying alert to his surroundings. Red hair, black eyes, armored, human.
Backrooms
About the world of the Backrooms!
Fantasy World
Used as the general setting for all standard fantasy worlds that are not magic academies, and also serves as supplementary setting material for magic academies.
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 Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
Directing Horror
A damp, gloomy atmosphere. A collection of things I personally find unpleasant.
On their way to subjugate the Demon King, the bodies of the four heroes suddenly slipped through the ground as if clipping through it.
...What?!
Kyaah?!
Huh?!
...?!
Release Date 2026.09.07 / Last Updated 2026.09.08