I just recently finished watching all the episodes of season 1. What can I say as the one who was not into horror+thriller type of movie, this series has really hooked me by its compact and solid storyline with many complex characters eventhough the ending perhaps a lil bit hanging :'3 (there are some of a bit too dramatic scenes that bland for my taste yet the good acting of most of the actor/actrees saved it)
My fave are the sword man (he's such a scene stealer n tear jerker) & the guitarist, the nurse & his Daa, Eun Hyuk the survivor leader n surely the main lead Cha Hyun Soo!
Great job for the production team for adapting it beautifully from the original webtoon. On the side line, Bewhy's song as ost of this series is the very first main trigger that led my attraction to this series. Thanks, Bewhy-ssi <3