Gu Xiao didn't know who he was or what he was going to do. He had forgotten everything in his life. He had wandered in the world for thousands of years, learned many things, and witnessed all kinds of things in the world. Later, he met System 0315, traveled to other worlds, and became a passerby. But there are always strange people pestering him. They are inexplicably familiar, but they resist thinking of them in their consciousness.
Concept: Not all stories must have a happy ending