Fog City looks like a normal city on the surface, but the city is gradually becoming "sick"
You don't have to believe in ghosts, but if you break the rules, you will disappear
Monsters are not scary, what is scary is the "phenomenon"
Like a door that appears where it shouldn't.
For example, a person suddenly starts walking backwards, but no one thinks anything is wrong.
For example, everyone will forget that someone exists.
