this is what im thinking too!!
I think that might be the case, and those black tattoos on him might not be tattoos at all but they could be demon marks
and the title is really interesting! sisyphus, a character known for pushing up a bouler up a hill in the underworld which often interpreted as someone who even within one's struggle one never gives up.
Yes if im not wrong sisyplus became famous for his lies and tricks,he was “the smartest of men.” After dying and going to the Underworld, he caught the god of death and chained him up. Because of this, no one on Earth could die. Ares, the god of war, had to step in and free death so things could go back to normal.
What if ML turned out to be the smartest of them all?
Why is he talking to himself like it's not even his own body? It's almost as if someone or something else is living inside him. What if he's actually possessed by some kind of evil spirit, and he doesn't even understand how humans work? Maybe that whole 'memory loss' story was just a lie to study us without raising suspicion