
I know I had already written Sisyphus myth here, but here's a theory based on the myth:
"When Death came to fetch him, Sisyphus chained Death up so that no one could die. Finally, Ares came to aid Death, and Sisyphus had to submit."
What if the town is actually Sisyphus and Guwon IS death. He doesn't remember his past and the people in town say he can't die because he's the one that keeps everything at bay.
In chap 20 we get told "This place, Stillwater Town... was a refugee for those who ran from death."
And the image shown is of Guwon eating a person.
Let's continue with the myth:
"Before he died, Sisyphus had told his wife Merope, not to perform the usual sacrifices and to leave his body unburied. Thus, when he reached the underworld, he was permitted to return to 'punish his wife' for the omission. But once back at home, Sisyphus continued to live to a ripe old age before dying a second time.
The gods didn't like that Sisyphus played them like that, so as punishment Sisyphus was told he had to push a rock to the top of a mountain, but once he is almost at the top, the rock falls down again and basically all his work meant nothing, so Sisyphus goes down to do the same thing over and over again. A meaningless life basically.
The funny thing about this myth is that nobody really forces Sisyphus to do so, there is nothing pushing him to keep on doing this."
SO, if the people of Stillwater are Sisyphus in some metaphorical way, then that means nobody is really pushing them to stay, vote for another's death, etc. They just do it because that's what they think it's "the right thing" to stay alive, or in reality to evade the guilt for choosing to stay even though Guwon (death) has taken everything away from them.

That's what it seems to me, they all assumed guwon would kill them so they went along with everything but he's been looking for people who would teach him properly. Tbh he's reminding me more of Frankensteins monster more then anything, the monster wasn't really the bad guy, had to be taught everything and everyone just assumed he was evil until he became what they feared him to be.

Yup, I based my theory on the name of the manwha, taking the myth into consideration, but every story about a "monster" can apply.
If Guwon is Death then he only acts on what he knows what to do, which is kill, but still gives free will to the town so they can vote for what they think it's right (since he doesn't know the difference between right and wrong) and they choose death every time, so he does what he thinks it's right based on their vote.
(We also don't know if the story told by the doctor is real)
The only person really teaching him the difference is Jinwoo, and still Guwon just says yes to what Jinwoo says because he really doesn't understand why what he did was wrong and he wants to please Jinwoo.

OMG!! I REALLY LOVE YOUR READING!! Very very interesting. The part of the rock totally was added in the story, when Guwon takes the protagonist and about how the rock in form of the moon can any time came down and destroid everything. So yeaaah...
NICE NICE!!This manwha is REALLY super interestiiing!! x3
In the newest chapter, Iltak is holding Hyunwoo's hand and he thought "You're gay, but you're a good gay"
Ksjdksjsjs I'm cackling!!