Yu'er is an elf in the mountains, she seems to be a spirit from the wind.
In fact, she herself didn't know how she came to be. She only knew that one day she was born suddenly.
When it was born, an old Taoist said her name was Yu'er, and she disappeared after integrating a book of laws of all things into its mind.
Although it understands all the laws of all things, what's the use of it? Every plant, tree, flower, and world in this mountain has no thoughts and cannot communicate. Every day, a person is bored to death.
When you are bored, you will easily become lonely. When you are lonely, you will meet our male protagonist.
