Could it be that the killer is "punishing" what he perceives as bad people, the girl that was killed first was…
killing someone for being mean, trying to get out of debt how is that justifiable? How is any of that worthy of death? It's crazy yo even said that plus the guy wasn't even a residence of the town how would he know his deeds? This is just a mad man who enjoys killing.
Along with the rest of the stuff you guys pointed out I'd like to add. Remember when he blacked out and Suho took care of him? After he had woken up, he looked at Suho strangely why? Because he also has powers and found out the beef Suho has with now elected Mayor. It also checks out that he was wrong about the coffee girl so no one would suspect him.
The only thing I cannot figure out is Why? Why would any of the citizens do such a thing?
This is just sad, I don't know if I can carry on. I feel o bad for the ex she truly deserves none of this. Why even write him with a gf if this is what it'll turn out to?
So mun's love story with ma ju seok is a love story more endearing than twilight. I suspect the new writer's dream…
What? There are different kinds of love sweetheart, y'all love romanticizing everything stop it. Do you not love your parents and would die for them? Does that mean you want to be with them romantically? STOP IT!
K-Drama 
Along with the rest of the stuff you guys pointed out I'd like to add.
Remember when he blacked out and Suho took care of him? After he had woken up, he looked at Suho strangely why? Because he also has powers and found out the beef Suho has with now elected Mayor. It also checks out that he was wrong about the coffee girl so no one would suspect him.
The only thing I cannot figure out is Why? Why would any of the citizens do such a thing?