On the surface, the modern city seems ordinary, but hidden beneath it is a “yin-yang delivery system.”
The living have food delivery platforms.
The dead have the “Underworld Post Station.”
Certain special night orders travel between the world of the living and the realm of the dead.
If a delivery rider accepts an “underworld order,” they must deliver it on time, or they risk:
Losing years of life force
Being burdened by debts to the dead
Getting marked by a ghost enforcer
Or even becoming “the next order’s recipient”
