it's been mentioned multiple times they have similar/the same soul imprint
The new ch suggests that Seoho's soul was planted in Minchan when the accident happened. I think Minchan was supposed to die with his parents but the soul was planted into him making him a vessel for Seoho
Bihwan said he smells Seoho soul from Minchan so I do think Minchan has a fragment of Seoho's soul, and coincidentally, he has the same appearance of Seoho... what the villain-boy is saying might be that he doesn't want Minchan, a half-assed fragment of Seoho, but bring back Seoho's complete soul in an indestructible body so he'll never lose him again...or i might be completely wrong. I'm confused
From the way he's been planning everything, I think he wants to complete the implantation so Seoho's complete soul can manifest in Minchan's body. It is confusing since we don't know what his endgame really is
If I’m getting it right, Minchan had nothing to do with Seoho, just because of the coincidence of looking similar to Seoho he is being used by that snake :(