CGPT's Manga

If you want to read this, you're a certified masochist. The FL is crazy, moreso is the ML. The FL is emotionally dependent on ML and hurts others who approach him; ML appears to hate FL but goes insane when he doesn't see her or when other men approach her. THEY'RE BOTH FUCKING INSANE.
I'm still inclined to read this though since the pain and regret is scrumptious.

EDIT:
I can't believe they had a happy ending. I think the novel ending wherein Li really died in that fire, and that fucking ML died in despair was the proper ending.