The guy who bullied og Yi-heon and ML both see him but as a "soul" or "shadow" of him and they apologize and new Yi-heon wants the old one to be back in his body but the old guy doesn't return and new one remains in the body.
You got me it’s so funny because I’ve actually been rewatching some of his old movies from the 80’s-90’s and damn, he was really hot, I could totally see the “inspo”
Clone. They have the same faces
That was my first thought!