I want to say that my reasoning for watching this show was just because I stumbled upon it, but lets be honest, I am watching it because of Gong Yoo. The man is attractive and I have loved all of the things he has been in that I have watched.
Back to BIG, I like the spin on the body switching in this series. I personally haven't seen this exact type of switching before, where it is only the one actor playing the role of two characters, one in appearance and the other in personality throughout