The paranormal has invaded the real world. Subway stations, hospitals, night market alleys, old apartment buildings... every corner of the city has become a hunting ground.
They are incarnations of rules. They cannot speak, but they are cunning and bloodthirsty, and they cannot be killed. Ordinary weapons are useless. Only the traditional ghosts that have awakened can stand against them.
An ordinary person can make a pact with only one ghost that is compatible with them in their lifetime.
The paranormal grows stronger, while ghosts are bound by obsessions. The two can devour, mutate, and enslave one another. Physical-type, shadow-type, rule-type, spatial-type... countless ghostly entities run rampant among the living.
When night falls, the streets no longer belong to humanity.
The only thing that can keep you alive is the ghost you made a pact with.
