Can anyone recommend more manga like this?

Even coming back here after eons doesn't diminish the quality of this story. Does anyone know more work like this or Save Me? Or sth even close to Berserk? Unexpected plot twists, grey characters, exploration into the twistedness of the psyche of students in their late teens or adults and a storyline that's rational and isn't utterly ridiculous. While stories like aroma of inheritance have that dark vibe going on and twisted shit happening left and right there are so many aspects of the story that are downright ridiculous and just not rational. Maybe that's the work's charm.
I've read most of Harada's works and I might add for clarification that I'm not exactly looking for depraved, crazy shit either~