This isn't a movie about a ghost. This isn't a movie about a boy who can see ghosts. This is a movie about bullying, about violence in school. You won't find this scary, but you'll like it because this is a movie about two friends who want to bring peace upon a lost soul. This has jumpscares and blood and all of that stuff, but what is scary here is the story itself. Things like that happens and this movie wants to show you the truth about the reality.
The story isn't finished. The characters could have been a little bit more complex, but if you'll take 90 minutes from your time, you'll find that you needed this movie.