Who Were We?

-Similar topic of a place in between. Characters aren't at first sure where they are or if they are alive.
-moves between worlds and at first you're not sure what's real or what's not.
-the Japanese is a movie so it moves very fast and you don't get the background of all the characters who are in the place (mine or working for the mine).
-Japanese movie is more philosophical, while Korean tries to be spooky and evilish.
The Korean series provides a lot of background on the characters and is a bit too dark in terms of cinematography.
-Of course, Japanese is minimalist as usual with fewer characters, but very beautiful cinematography.

May contain spoiler: We watch characters in the movie staying temporarily in the "in between" dimension, and are in their process of deciding whether to "move on" or remain.