Ghost Raising System: My Ghosts Can Be Upgraded

After reading the first story, I was able to read it, but I was a little confused. Because there was no introduction to the world view and related settings, I had a lot of questions about this [scene]. For example, is it only the male protagonist who uses the scene as a haunted house? Which world is the male protagonist in? Do ordinary people exist in that world? What use does this scene have for other hosts, and is it used to open a haunted house like the male protagonist? So are they all opening haunted houses in the same world? I hope to see relevant setting introduction later.

It's pretty good, but the number of words is small.