Try Under Grand Hotel, it's a bit similiar to Deadlock since the story takes place in a prision but I'm warning you, U.G.H is pretty dark... Killing Stalking is also good and it messes with you emotionally and it's pretty dark as well.
I will try U.G.H.
Killing Stalking i have already read it and i don't like it. In the start is interesting maybe because is unexpected but after few chapters... no, it's not good from my point of view.
Thanks for recommendation. :)
UGH isn't dark. It's just graphic.
I want recommendation for manga/ manhua who is like Deadlock/ Royal Servant(only in emotional way)/ Dark heaven/ Moritat/ Escape journey... something like that. :D
Someone please help