have you read this? def one of the best!
https://www.mangago.zone/read-manga/bastard_hwang_youngchan/
This? https://www.mangago.zone/read-manga/plaza/ (completed)
Yes I have and loved it
Sounds similar to castle will read it thanks g
Sweet home, tomodachi game(peak asf not a manhwa tho) ,juujika no rokunin (holy peak but not a manhwa)
Twisted - horror - psychological- crime - muder - mystery- supernatural ? ( Not necessarily)- manhwa only.