I feel like Daewoo is the real serial killer and he's been lying on Woo-yeol, he told Joon that Woo-yeol was the one who agreed to sent seong-ah on the date with the creep but we know that's not true because Woo-yeol tried to turn down the creep but the creep said that Daewoon already signed the contract so he couldn't turn him down, so he lied to Joon. That and fact that Joon said he's getting a strange feeling from Daewoon and the weird look he gives the tall buff guy that came with Joon to the human world makes him suspicious.
But on the other hand we dont know what Woo-yeol does for work so he very well could actually be a killer. ┑(￣Д ￣)┍
Daewoon is Woo-yeol’s friend’s doppelgänger. He killed the original Daewoon. Woo-yeol is not a bad guy, that’s the story the devil that made him fed Sang-ah so he could kill him and take his place.
I feel bad for Woo-yeol when he finds out his friend has been dead all this time and the one he’s been thinking of as a friend is the one that killed him.
wow i never thought about it like that… it all makes sense the devil gives them stories to make them feel less bad about taking their lives…
damn i wonder what he’ll do about this damn ghost this man has so many people trying to kill him lol. i think he’s a good guy and i wonder if he’s really a serial killer like they say