I watched this series back in 2019 while I was on a trip with my family and decided to binge watch all the downloaded episodes in the bus.
That was dumb. I agree cuz after watching this series I was left dazed and in denial for days. Last time I was this baffled when I watched the "House of Secrets: The Burari Deaths" docu series.
From first 5 min to last minute I was hooked! I couldn't take my eyes off the screen. All of characters were written equally weird and wonderful. Not only Im Si Wan and Lee Dong Wook acted well but also the other characters like Park Jong Hwan, Lee Joong ok and Lee Jung Eun created an eerie aura which will make you realise how gruesome-ly each characters are real.