Basically theres our mc (lets call seowon 1) he was in the real world and got transmigrated to the game right? Then after he sacrificed himself and died, our pov went to seowon 2, he's not our mc, but he's the seowon who lived in the game, whose identity our mc "took".
So after our mc went to the game, seowon 2 came to the real world(where he's actually originally from), but then in ch 62 the pov goes back to our mc seowon1 and he's kind of like in a limbo and he goes after jehee with that clock thing wich has the ability to take him to the new timeline jehee created(after he turned back time), when he (seowon 1) get transported there he doesn't have his memories, he's mentally like he was in ch. 1
I'll try
So let's say (seonwoo 1) is from real world and (seonwoo 2) is from game world.
Seonwoo 1 and seonwoo 2 got exchanged when they were small, seonwoo 1 was now in hunter world and seonwoo 2 was in real world.
After 20 years, they again transmigrate back into their respective worlds. Seonwoo 1 goes back to real world and seonwoo 2 goes back to hunter world, from where he originally was. Then we see the start of this story, ml sends chorok to kidnap seonwoo 2. Everything happens and then seonwoo 2 dies to save everyone else and then he was stuck in a different dimension, while we see seonwoo 1 pov for a while, but he is not the mc. Then seonwoo 2 finds that clock he steps on it, he had ml's watch, he is back to the hunter world again.
And the end seonwoo 2 is our mc, who was originally from hunter world but transmigrated into real world, and then after 20 yrs he came back to hunter world again.
Hope it helps

Can anyone explain the last 2 previous chapter(ch 61 & 62)?? I'm kinda loss'