Once upon a time, there was a master of demon slaying who had a good reputation and was deeply respected by the demon slayers. However, a rather unreliable young master of the family appeared. He obviously had God-given abilities, but he was unwilling to be the master of the family. He opened a pawn shop by himself. It was not limited to humans or demons. Everything could be pawned.
On the day when Xian Shiwu just came of age, a man came to the pawn shop, a man who was about to die.
The person who came was a living thing, a child.
Unreliable adult x serious little adult
Author: Don't worry, readers, I won't be a pedophile. Children are the flowers of the motherland.
Intention: This answer is very long and it will take me a lifetime to answer it