The world is not as solid as you see it. When night falls, the neon lights of the city cannot hide the cracks in reality. Those anomalies called "rules" are like invisible curses, distorting the laws of physics and subverting logical common sense. They originate either from forgotten history or from deep-seated fears, turning familiar street corners into cages of logic and turning everyday trivialities into deadly puzzles.
Silence, a young man with a unique ability to "perceive rules", is the "boundary watcher" who walks on the boundary between reality and illusion. He does not have extraordinary military power, only a mind that can see into the nature of rules, and a heart that maintains order in chaos. Every time dusk falls, he must sneak into those areas that have been eroded by the rules, looking for vitality in paradox and despair, not to slay demons, but to correct distorted perceptions and bring the collapsing reality back on track. But as he comes into contact with more rules, a deeper secret gradually emerges - where do these rules come from? And what role does he himself play in this endless "correction"?
