to start off there are 2 seonwoo’s and 2 universe’s/parallel worlds
our seonwoo (the one who we’ve been following from chp.1- 60) is originally from the hunter world and the other seonwoo who i’ll call human seonwoo is originally from the human world (meaning no monsters or hunters) both seonwoo’s swapped places when they were 9 years old and then they swapped back again at 20 smthg years old so when this story started our seonwoo went back to his original world (the hunter world) and human seonwoo also went back to his original world (human world), as you know our seonwoo died in chp.60 thus jehee restarted the world and so now we’re all the way back to chp.1 but this time we’re following human seonwoo and not our seonwoo, that’s pretty much the gist of it and what i understood from reading multiple explanations
hope this explanation helped i tried to keep the key points as to not make it confusing
timeline
chp.1-60 we’re in the pov of our seonwoo -> chp.60 our seonwoo dies which causes jehee to restart the world and now we’re all the way back to chp 1 -> this is the backstory that we found out chp.61 thanks to human seonwoo: we find out that our seonwoo and human seonwoo switched places when they were 9 which means that our seonwoo is originally from hunter world and human seonwoo is from human world (we can also assume that our seonwoo forgot that he switched places becuz he doesn’t remember anything in chp.1 of this manwha he’s just confused asf) -> chp.61 aka chp.1 becuz jehee restarted: both seonwoo’s switch places again and we’re in the pov of human seonwoo NOT our seonwoo -> human seonwoo is confused asf becuz they’ve both switched places again but he’s happy becuz he’s finally in his original world and so he says “i’m home” -> okay this if gonna be confusing but for the explanation of the mom saying his dream was to be hunter basically that was our seonwoo who said that becuz he was originally from the hunter world then he “went” to the human world and was like “hey i wanna be a hunter” to the parents and the parents were like wtf r u yapping about?! becuz they’re in the human world not in the hunter world that’s why human seonwoo is like “i said that?” becuz it was our seonwoo who said that when he was 9
i fear this might have made it more confusing for u but just know in short if u don’t feel like reading all of that, that we’ve “time traveled” to chp.1 (becuz of jehee) our seonwoo is still alive (becuz of time travel) and his og world is hunter world he just doesn’t remember that and the seonwoo we’re following rn has travelled back to his world aka human world which is why he said “i’m home”

after reading multiple explanations i can now say i get what’s happening