I think it's Korean actually xD
It's actually good but there are just lots of little things that after a long time of reading it, it makes you annoyed. For example, there are moments where there are continuity errors and personality changes. My friend started up her own version of it using actual science behind the ideas and scenes rather than going a bit too extreme. There are novels (not that I've read them) and they have a film due to come out next year I think. Although that date has been delayed several times. There is a trailer but it's so bad and I don't think it's a proper trailer.