I watched only 4 episodes for now, but I think Se Gi character is interesting, at first he seems more attractive than Do Hyun, because Do Hyun looked blank and reactive. So Se Gi made a great contrast to him, he definetly cool and badass, but somehow I like Do Huyn better from the 1st episode, and he starts to shine in next episodes. What I don't like in Se Gi (and Ferry Park, maybe others too) it is that he is irresponsible, he do that he likes and not bother himself about consequences. Like this situation with returning to Korea, I can get why he wants it, but can he do it in a smoother way and not piss off grandma or warn Do Hyun at least, because from that I see already from both of them only Do Hyun capable to rule the company. Still, I find interesting Se Gi determination to get rid off of Do Hyun. Has Ri Jin appearance been the only reason? If he can do that, does he sure he dominates other alters? It seems he is not very mature in his action.
Sorry for any English mistakes.