this isn't a brag or anything obv but I read the entirety chapters of The Warehouse and Killing Stalking, summer of 5th grade. I don't know if reading it now would make it seem like I was exaggerating cuz I was only young (and honestly I know that there's SOO much more disturbing reads out there) but it was pretty heavy on me as an incoming middle-schooler. That same summer, I also decided to read Dark Fall after seeing it in a wholesome edit and then I decided to stop. There's also Blind Play too.
Bsically anything with Stockholm Syndrome I found hard to read- where the 'lead' r@pes, controls, etc. to the victim and masks it as 'love' or amusement. It aways leaves some sort of icky feeling afterwards
adding onto @沙琪玛, these manhwas are so generic and hyped up so much but they are truly weird and disturbing. The main character, a serial killer, is having s3x with an obsessive stalker, whom he literally made him k1ll a man and kept up locked in his house (Basically Stockholm syndrome) while imagining his own MOM and moaning "Mother"

what's the most disturbing manga/manhwa/manhua you've read??