Darkest Manhwa You Have Read?

I read lots of fluff, but I read just as much, if not more, angst. I was curious what you guys think is the darkest Manhwa you have read. In my case I am going for physcologically dark, not Gorey. (I am the kind of person who can handle the deepest depths of physcological horror, but overly graphic violence and Im out)

Anyways, I would say the darkest I have read is.....
Trapped (Olgami)
one of my favorite Manhwa, it has such a good plot, and it really dark, I have honestly never seen a toxic ml done as well as Yunsu. I mean, Reinhart is my favorite yandere ml but Yunsu is who I consider to be the most well written.
Honorable Mentions:
Dreaming Freedom
Roxana
(This one I didn't find SUPER dark but I'm still mentioning it out of necessity) I failed to Oust the Villain
The ones that are not on the same levels as the last but still dark:
Their Obsession Will Ruin Me
Praesepe Outside the Cage
How to Survive as a Maid In A Horror Game
I tamed a tyrant and ran away
Do Your Best and Regret
The Reason Why The Villainess Picked Up the Sword

Curious what you guys think the darkest Manhwa you've ever read is!!!