When the world falls into a crisis of "weird rules", all survivors regard all rules as life-saving rules that must be absolutely followed, but the protagonist discovers the "logical loopholes" and "forbidden lines" hidden behind the rules. He does not use force to fight against terror, but analyzes the "code logic" of each rule like a top programmer, and uses the contradictions of the rules themselves to "bug" them - either by making monsters kill each other, or by reacting terror rules on the strange source of the rules. The other survivors survive by "avoiding the rules", while the protagonist rises by "defying the rules". This is a subversive setting.