I feel like people don't grasp the nuances of the drama or maybe it's because it's a sensitive subject but I see a lot of extreme opinion about the characters without leaving them the benefit of the doubt. Relationships are not black or white, the same way humans are not either.
I don't remember anything about the first season. Are they connected heavily, or can I watch this one regardless?
I think it's ok, memories come back quickly. There is just 1 bad guy from season 1 who is in season 2 that I don't remember but I still enjoy the drama. But if you really forgot everything maybe read a summary first.
Have you watched "Missing: the other side"?Season 2 aired and it's really good. I'm currently watching it.
Not really. Only the part which is about the story of the dead people. You cry in both because of their death and you also have closure in both for each person. But in Missing you have a big part of investigations and a mystery. The MLs are kind and funny and the atmosphere is nice in the village. So it gives you the same feelings but it's also a different concept 😊 Missing is more hopeful because yiu see them happy in the afterlife.
1 
Relationships are not black or white, the same way humans are not either.