Probably dead
Imo it's also possible that it's a time paradox case, as in he's always been Heejae's future self that's intentionally posing as an older brother.
I hope not
yesss I was thinking of this theory tooo but I feel like it wouldn’t really work since the MC already had a big brother prior to the time period he regressed to (idk if I’m making sense) but as in there’s already memories of his big bro that MC from the future didn’t create (bc he didn’t go that far back in time),, like memories of big bro in the lab playing w the kids and stuff
That sounds cool, but then the timeline he went back to didn't quite match up
Love the found family trope so much~~ yet I can’t help but wonder what happened to his real older brother..he seemed so sweet :((