sad/disturbing kmovies

hey, i've recently watched shoot my heart, a stray goat and steel cold winter and I was wondering if anyone could recommend any movies that were similar in genre that are either sad or disturbing.

I've watched  Steel Cold Winter as well..♡.

http://mydramalist.com/11314-train-to-busan
http://mydramalist.com/7708-thorn
http://mydramalist.com/2913-the-tower
http://mydramalist.com/7240-the-terror-live
http://mydramalist.com/2107-the-crucible
http://mydramalist.com/1538-the-chaser
http://mydramalist.com/1279-rainbow-eyes
http://mydramalist.com/1268-no-mercy
http://mydramalist.com/1905-blind
http://mydramalist.com/164-a-moment-to-remember
http://mydramalist.com/3199-howling
http://mydramalist.com/6722-azooma

I hope you enjoy watching them! :)

If you want disturbing (not sad), I'd recommend I Saw The Devil. Some (if not most) Kim Kiduk's movies can be considered "disturbing" as well, like Pieta or Moebius.

Definitely Han Gong Ju. Both disturbing and sad and it's based on a true story

Oldboy. This is the most disturbing movie that I have ever watched. The plot twist really fuck up me!

Sad: The Throne 

Disturbing: Oldboy

Ichi The Killer is probably the most disturbing movie I've seen, not sure how similar the plot is to the movies you provided. 
Oldboy is a great movie as well, 100% recommend it
Our Town was a little twisted, it had an interesting plot