Check out harada and akabeko's works. I find haradas works to be repulsive sex horror so I'm not that into it but akabeko creates interesting stories that you might wanna check out. They aren't as long as the works you gave as an example and they're mangas not manhwas so I'm not sure if that's what you're into
The Beast Must Die (One of my faves ever!)
Max Mojave's Case (Very underrated)
Hogu Hagyeongsu
Black Mirror
Criminal Interview
Obey Me
Moritat
Stalker's Game
Love Me, Eat Me
Red Mansion
Dreadful Night
Red Mansion
Mary Jane
Truth or Dare
Marionette
obey me, not my cup of tea but it's fucked up I suppose
Pls rec me guys some psychological horror bls like black mirror, warehouse and Sheep’s mask
I want some fcked up dramas, thanks!!