I feel sorry for Ha Ji Won to be involved in this fuming hot garbage. As always, Zo In Sung playing a mentally deranged character. What needed to be said have been already said by everyone, there isn't much to add. If you want to watch it for whatever reason, I highly suggest you read any spoiler before watching it. This is the type of show you need to know the spoilers before watching.

The ending:
Jae Min become possessed by an old midget goblin demon soul and goes to buy a gun like an emo kid who wants to take revenge on the world. Then enters the room inconspicuously and empty the gun magazine into both Soo Jung and In Wook while laughing and giggling. Both were laying on the bed drenched in their blood. Then he smirks and says "we live in a society". Then goes to the beach at dawn to watch the final sunset while playing "Ohio Is for Lovers" by Hawthorne Heights on his Walkman. Then he shouts "the world is so cruel!!" and shoots himself in the head. Big sadge!