Ok, i'll check femme fatale out. Though it seems decidedly unsmutty, it does look kinda funny and interesting.

One chapter in: Theres something disorienting about it, like its not clear who is saying what, whether something is spoken or thought, and when we are in the present or memory, it kinda just drops u right into the middle of the story. I'll try to power through but so far i kinda dont like it.

Femme Fatale needs a bit more careful reading. Trust us, it's down your alley.

You might also want to check out Glass no Megami, though it's been a while since I read it so I can't remember if it's really that good.

Did you read Toshiue no Hito? It's probably the only one left that I'm aware of (not really a masterpiece eh, you guys already listed all the good ones 😛 ).
And since it's not mentioned so far Aku no Hana. But I really don't like it. So you read it at your own risk, lol!

What I like in Trivial Pursuit style. Pick your category:[img]http://i379.photobucket.com/albums/oo233/Reid4891/Manga/trivia-1.jpg[/img]

you should check Koibito Play,if the whole borderline hentai is not importan for you then you should also check Solanin and Ohikkoshi