First of all I want to say that I thought this would be a Ghost Story and I had no idea what the synopsis is or what the manhwa is about and was so dang surprised that the situation the MC is in much much worse than I pictured.
This is a Kdrama which makes really feel creeped out and disgusted with the atmosphere itself. I literally had goosebumps and felt something was wrong so many times in the beginning itself. Though the violence in this is not hidden in any way we know exactly what is happening yet not shown too much. Even then I skipped through most of it.

The Acting is PHENOMENAL! Honestly every single person are so so perfect! Hat's off!!! Truly!!
We continuously root for the MC to survive and hope he doesn't get too affected by the people around him and the situation he is trapped in and helplessly watch as each episode becomes more and more twisted.
I must say one of the best Survival Horror stories I ever saw and just in 10 Eps of 1 Hr each! The pacing is well done, the editing, the Eden Studio itself, the atmosphere and just everything.

A Must Watch! Though this Kdrama may not be everyone's cup of tea.