This story ought to come under psychological category rather than supernatural.
It was interesting to see the character dynamics. Youngmin seemed manipulative from the start —which he actually is. Gongchan was surprisingly very self-aware, considering how much of a clumsy fool he is. The other characters were nice too. Tae-In's infatuation was also interesting. The ending felt a bit abrupt but I guess it was purposefully ended on a mysterious note, since the story has always been kinda ambiguous. ╮( ̄▽ ̄)╭
At the beginning it was so complicated with the love triangle that I couldn't come to like any of the main characters. The three of them were pretty much dumb and dumber. Doyun had a nasty temper, Se-in was careless and Ji-eon was indecisive. I know all of them had faults but Ji-eon took the cake when she decided to date Se-in knowing that she liked Doyun. The misunderstandings were supposed to be funny but some of them were pretty annoying.
I also felt like gradually the characters lost some personality even though they had some personal growth too. I mean to say that I feel like they all could have been so much more. But I guess they all got a decent ending. I wanted Sahye to get jailed (preferably by that 'potato', as Doyun calls him) but at least she got some sense knocked into her and she moved away, so I'll take it.
Overall, I think the comedy and drama elements could have been handled better. But it was a good webtoon.
Y'know, for reason I imagine marquess Duhem to have Dio/Toji's voice. A sultry villainous voice.