My first psychological horror from korea and im glad i watched this. I dont think i can say anything that the rest of the reviewers haven't said but i will mention how great the actirs were. I especially liked the actor for the twin and love how he acted the giggling and stuttering of him. I saw the actor for Moon-jo in another show and i didn't recognize him, i might just be dumb for not realizing but that was a great transformation. The only that i can nitpick was the adding of the military friend, he was useless and wasnt necessary. Other than that its pretty great. I know some people complaining the fact that it isn't accurate to the webtoon but i like it that way because if it was, then i don't have a reason to watch the show since i could the read the comic for free. So for anyone who want to watch some psycho-horror imade by korea i suggest you watch this.