Gods, demons, and humans live together in this world, but at different latitudes. Some gods and demons who are unwilling to be lonely tore a crack in the world and let them come to the human world.
So gods and demons once signed a contract, and no one on either side could interfere with anything in the world.
Thousands of years later, the barriers of the Three Realms were weak, and a large number of gods and demons poured into the city and began to disrupt human life.
