We learned early in the first episode of "Thirty Nine" that one of the lead characters would die. I had assumed that this would be the drama's endpoint, but by the end of the second episode we already know that Chan-yeong is the unfortunately fated lead , from some vague yet serious medical condition. We also know that for some unclear reason Mi-jo's immediate response is to blame Jin-seok (played by Lee Moo-saeng), with whom Chan-yeong has been having some kind of emotional affair?, Thirty Nine, Jeon Mi-do, Kim Ji-hyun-II, Kim Sang-ho-III, Lee Moo-saeng, Lee Tae-hwan, Son Ye-jin, Yeon Woo-jin, Yoo Yeong-ah