Doubtful. I'm not dismissing it entirely but the runaway thing has been done & seeing SH freak out too, it's gonna get tired if it happens again. It's just gonna seem like a repeat, & a waste of a chapter. And we all want character dev which has been happening slowly, if he keeps reacting the same way, it's just like going in circles & him learning nothing. If NK is abducted I think SH will know he left against his will. NK takes his painting tools with him everywhere, except for on the shopping trip. If he is kidnapped, leaving his tools behind will be the only clue SH needs. That would trigger a rampage but of a different kind, as SH would pull out all the stops to recover NK & Jihwa & everyone else will know without a doubt just how much SH has come to value the painter, & hopefully NK too will realise he is meaningful to SH.

I have a theory...
that during this snowy season, Nakyum will encounter the hired killer and will be disposed of (like pushing Nakyum in a ravine or whatnot), but he'll survive the attempted murder.
Then, Seungho will think Nakyum ran away since his learned sir is sent away for the exam and goes on a rampage. If and when Nakyum manages to come back for some reason to the main house, Seungho will marathon boink him and then lock him up and probably won't believe his story since who would want to kill a low born?
....but this is just a theory I think will happen in the next season, lol.