After watching the South Korean zombie thrillride Train to Busan, I looked up the director, Sang-ho Yeon, and learned that his early career consisted not of live-action thrillers but of animated dramas that took on serious issues. I then watched Seoul Station, which is an animated feature about the same zompocalypse that seems to be a bridge between those early films (which I still haven't seen) and Busan, mixing zombie action with a serious message about the plight of the homeless.
Apparently made before Busan but not given wide release until that movie's success, Seoul Station begins with an injured homeless person staggering through the city. A homeless friend can't get help from the harsh world, the homeless guy turns into a zombie, and all hell breaks lose.
The action is constant and the characters are interesting if not generally likable. It's got some interesting twists and takes a dim view of the police. The animation is fine and possibly motion-captured but not much of it is memorable.
It's really a good movie, and at some point I will check out Yeon's other animated films. I'd recommend it.
