Five years ago, a vision appeared in this city. These illusions are like ghosts, with different buildings and different people appearing, but they cannot be touched or communicated with. It is interspersed in the streets and alleys of the city. These illusions will appear on the second Friday of every month, starting at dusk and disappearing at night. Gradually, people became accustomed to it and called this phenomenon the "twilight boundary" that appeared in the city at dusk.
This is a common phenomenon, but why am I looking at this fantasy person?
Concept: Dystopia