If it's the dead friend's heart, it could be necessary. There are endless possibilities- perhaps the dead friend…
My first thought was that she would push him away for the same reasons you mentioned, like "his feelings are not really his"... guilt toward the dead friend..etc.. like as it was my first drama and I believed they would be just lovey dovey lol. I'm sure it's the dead friend's heart and he was trying to protect her, SML looks way too suspicious. I guess I just wanted more romance before the unavoidable drama.
I like Jun Ji Hyun, horror and zombies and thought it was ok, not that great, not that bad, not scary, a few interesting things but I was expecting more. I still recommend it if you like the genre.
I mean u can't build a helipad beside a hospital it's gotta be in open space
Even if I think a wheelchair was better here (and faster) (an appendicitis is an emergency) the real issue is not that he's walking or not, it's they are walking - on the sand -on a beach- anybody knows how difficult it is, like walking in the snow, and it's even worse for someone in pain, maybe it was a shortcut... but I think it was just for the dramatic effect and doesn't have much sense in reality. In reality the shortcut would be paved ;)
maybe coz the case involved his own sister and her boyfriend..
It's his personality and the reason why he was sent in that town/village. He hits first and thinks after. He's driven by his emotions and messed up more than once. Actually he shouldn't work on that case because family is involved but in fiction...I prefer the character of the journalist.
I liked the OST.