Initial Thought: I enjoyed the first film so I decided to go ahead and watch the second one as well. It seems to follow the same formula. Hopefully the twist is as good and/or unpredictable.
Characters/Acting: It has quite a few more people I recognize than in the previous installment. Also Hyeon-sang Kwon returns here as a new character. For the smartest people in the school a lot of these kids are disrespectful and don't take things too seriously. I honestly didn't find a character that I particularly liked.
Story: A group of high school students and teachers who get locked in the school after the swimming instructor is murdered. It almost sounds exactly like the first one with the only change being a teacher murdered not a student. It doesn't start as strangely as the previous film does. It takes a bit longer for things to pick up this time around. The twist is revealed a lot sooner. I thought it was fairly interesting. The death scenes are much better than the original. I didn't really like the way this one ended. It seemed out of place with the rest of the story.
Directing/Writing: It's a shame Chang didn't return to direct. We have a completely new director that doesn't seem to have any other credits to his name besides this. A stranger thing even is that there is no writer credited for this. I like the mixture of English thrown into the dialogue. The extra title Bloody Camp has pretty much nothing to do with the movie. As to why they added it makes really no sense.
Final Thought: Besides the death scenes this was pretty mediocre. The mysterious qualities weren't quite as entertaining here. The ending felt like it belonged in another film. It's only a one time watch for me. Even as it's own movie it's only alright.