I'll admit that I wouldn't say that I am a fan of K-drama but I like to watch them once in a while. I had seen the trailer of this film quite some tome ago but I haven't seen it yet. From the little I know, the story sounds fresh and horrific. It's definitely something I want to watch.
It's nice to have you reviewing again!
You're right that this story is quite fresh but yeah, I have to say I wasn't a fan of the less dialogue and some of the actors that I thought was the main character apparently wasn't. I hope you get to watch it :)