I am Bai Wuchang, the temporary substitute in Hell, and my master is Bai Wuchang and Xie Bian. But because he suddenly ran away, I worked for him for hundreds of years in vain, and I didn't have any money to collect.
Then, I quit. In order to ask my master to write a letter of resignation, and because I wanted to make money, I was assigned another identity by the Emperor Yama. The main job is to be a staff member of the Supernatural Management Bureau in the human world, and the side job is Bai Wuchang in the underworld who has no money.
Concept: The story of Bai Wuchang temporarily working in the human world to make money and looking for a master. He will also meet many people who are not human.