I just binge read it just now and reviewed some similar theories people had.
Warning for those there are spoilers:
1. The scene of Guwon coming out of the rubble uninjured and no one noticed him. Plus how he made his way to the village from what seemed to be the city.
2. Guwon's tattoos especially the stitches on neck/ankles give the impression of put together undead frankenstein (could just be style choice) with the blackout arm sleeves.
3. The title usually has a big connection to what to expect. So looking up Sisyphus who is part of Greek mythology, he was the one punished in hades to roll a boulder up a hill only to watch it roll back down before reaching the top. He was so arrogant he could do it, he continued non stop. The only stone mentioned is the one at the top of the mountain he showed Jinwoo...always looking at it to make sure it wouldn't roll down. How the hounds fit we still have to find out.
4. When he killed that undead/maggot at the mountain viewpoint, the eyes looked to be the same color as Guwon's.
5. The multiple mentions of the moon which he also called the stone at the top of the mountain.
6. The scenes of Guwon talking to himself seemed like was someone else is inhabiting this body and playing an act or a split personality. Even more strange with the nose bleed, vomiting, fainting.
7. Jinwoo also seems to have more hidden things about him. Welding that knife and choking Guwon. Not taking the gun from doc like he knew how to handle himself...or didn't trust himself with a weapon. Both him and the dad had to do things to survive as long as they did. So I hope we see more of this timeframe. If he did agree with the girl's plan to get revenge, his persona flipped from the jumpy nature we saw before.
8. With no doc is the kid going to die regardless? I still wonder why these 3 kids were allowed in but not doc's family.
The way i view the puking was like when a dog licks you and though it's cute, it's also disgusting if it gets in your mouth. My theory comes from all the dog allegorical comments and relations in the way Gunwo treats people, like he categorizes some as cattle and others as puppies, you see how he was reluctant to open his mouth? Then after the taking a nap chapter, Teach mentions the shift in his Behavior, like almost a human romantic interest (but not an equal).
Also a little more into a head theory, the way he gives the ring at first is more like a collar than a romantic gesture.
Like some dogs are cattledogs and only one is his house puppy
You brought up some good points! I can see how the shift in mindset between cattle to beloved pet would cause his reactions. I agree the ring is more of ownership collar than anything romantic. There are so many interesting subtle dynamics in imagery that can lead to so many theory's. I can't wait to see where they lead to next! Just from this start I don't quite see how this will turn romantic by any means, but I like when a story keeps you guessing.
Man this was cringy at times by how overly nice both MC and ML were. Not to mention what seems like a 15 yr or more age gap. But the kicker was the 2 "childhood friends" like WTF!? Who doesn't think of getting help from a professional about their trauma first. Both of them should! and actually had a conversation with each other. But no, let's toxically involve ourselves with another persons relationship and settle with them rather than dealing with the root of the problem.
Both MC and ML should have been more stern and had boundaries from the start. They weren't even mad enough and forgave them so easily.