When he killed BJK's parents, the father was really surprised because he thought he was a good boy. So... What…
I think it was for revenge too. The whole Penthouse concept is people revenging in circles. Now I think that the kids will start to revenge their parents, so it will pass from generation to generation... So messed up!
I'm not sure why, maybe because tvN has bigger budget and more viewers? As for the copyright , both tvN and OCN families are under CJ ENM E&M Division anyway.
I like the thing that the thinks we can predict happen right away! for example:
It was clear that the reason a captain from USA stays in Korea must be the death of his sister and she dies in ep 1. We saw that the villainess looks like the FL and it was predictable that people would suspect her and they will in ep 2!
If you thought they would give us some explanations in the last ep, the joke is on you. LMAO. What a waste of potential and our time... no wonder the views are so low (even for OCN)