Responses
I think his past self took over the present one in the accident
And because the old kwon died the white hair guy loved him so much to the point maybe he killed the present one to be able to stay with the now alive present kwon
the way I bloody related to having reread this a crazily-unhealthy amount of times
I thought of that but at the same time how is he able to kept the core memories but with the new chapter this looks more plausible
I have reared this an insanely amount to notice some things.
One: Not only his hair but his eyes changed color.
Two: he makes it quite fast to point out there inside. Like he knows kwon won't like it.
Third: if you read carefully he sometimes looks like his talking in past tense.
So my theory it's that here ml is just a curse/demon made by the original sin or is part of it and has been hunting kwon so he is always alone so he can weasel his way into his life always.
What I meant by sin and from the little to no information we have.
Kwon was in a relationship aka marriage (sounds more like a sacrifice) and he wanted out so in an attempt of it he accidentally kill his husband and by the looks of it he gut hurt in turn like his neck was cut.