I haven't seen the original south-korean version, but there is one big issue with this movie, one of main character is too predictable. From beginning I can already guess who this character really is when I watch the character's behaviors, so that made the reveal at the end didn't really surprise me at all. Then after the first and second bullies are killed by the ghost, you can already suspect that the ghost is on the protagonist side which reduces the suspense. And the bullies character isn't really convincing as a very bad character that deserves to be killed, which made me feel sorry for them when they are killed, and even more so after seeing the ending. The ending itself isn't really good and satisfying. Apart from that, the school environment is really cool and there is nice soundtrack at the end.