World view: In the modern urban background, there are supernatural forces parallel to human society. These forces follow strange, strict and logically consistent rules. A few people or organizations who know the truth try to exploit, control or fight these forces.
The core stage - Linyuan City No. 17 Middle School: a private high school located in the outer suburbs and fully closed. It is known for its nearly 100% admission rate and an equally ridiculously high rate of students dropping out due to "mental breakdowns." The school itself is a living, ancient "contract" creation with weak consciousness, a "pasture" that harvests high-quality spiritual energy (mixed from fear, despair, and intellectual activity) for some indescribable "being".
Core Rules - "Student Handbook": Every new student has a booklet with hundreds of "school rules" printed on them that seem to be nit-picky but are actually a matter of life and death. These school rules are the rules that maintain the stable operation of the "pasture" and are also the shackles that bind "existence". Violating school rules will trigger corresponding punishments, which are strange and irreversible. But between the lines of the school rules, there are also hidden "loopholes" that can be used to counteract dangers.
Core enemies - "Supervisor" and "Principal":
Monitor: School staff (security guards, cleaning staff, cafeteria ladies, etc.) With vague faces wearing gray uniforms. They are the enforcers of school rules, without emotions, and their actions are precise and efficient. They will "clean up" students who violate the rules, or appear in a specific place at a specific time, which is itself a mobile "rule phenomenon."
