To clarify, I will call the seon woo we read about till now "our", and the other well... "other".
The one you see in chap 61 is "other", he was originally from the world without monsters, at age 8 he got sucked in the game and opened his own clinic, when our got sucked in the game at the beginning, they switched again. That means our always belonged to the world with dungeons. From age 8 to the beginning of the story they were in the "wrong world".
Look at it like a multiverse, the jehee we see in chap 61 is technically a stranger to us (not the one we read about till now), just like "other", he belongs to the world without dungeons. I'm guessing "other" knew him from the news, they never actually met
omg thank youuu, very clear!! and is this timeline now back when our mc didnt know ml? does the love interest not remember mc?
im quite confused on that half, still
ouuu thank you for this ! I was genuinely like ???
I am so confused. Even after the explanations in the commments idk which seonwoo is it in ch 61 and which world is he in. And is it the og jehee in ch61 orrrr