Who is watching them from far ?

I thought it was the assassin. Remember when he said, “If you dare tell anyone about who kidnapped you I will cut off your tongue” or something like that. and since Lord Seungho found out that Nakyum didn’t run away, the assassin most likely put two and two together and thought Nakyum had told Seungho. That’s what I think at least.

But the skin tone of the hand is lighter than the assassin :(((