I read the prologue back too and yes! It very much appeared that it was a robber in the prologue but then Teach’s dad in the last chapter.
Reread chapter 24!
He had a brain injury and wasn't exactly recollecting everything correctly. There was a robber but the dad thwacked him on the head and then Guwon came and thwacked the dad.
Pretty sure the prologue was from a different/original time loop. My question then is why would the two timelines be different before he got a chance to loop back. Perhaps it’s a different choice that Guwon made since they are supposed to be looping together? In that case I wonder what is the criteria for them to regain their memory since Guwon remembered right before dying but MC only remembered his current past loop after dying.
Wait so in the prologue the one guwon killed at the start is a guy who tried to potentially harm him but in the new chapter it is his father? Maybe I just don't remember the story properly