I'm looking for a manga that questions the nature of reality, and makes the protagonist(s) doubt whether what they're seeing/experiencing is real. So, obviously a psychological manga to some extent... A manga that makes you feel sort of like you're inside an optical illusion, in the sense that there are different ways of perceiving reality, and you can't ever be sure that any one way is entirely correct.
After School Nightmare is the consummate example of this (that I've found) - reality is so totally messed up, and it's hard to separate what is real from what is not. And this is despite the fact that the characters (mostly) aren't crazy...
Homunculus questions the nature of reality, too, as does Paranoia Star.
I'm also dying to read a manga like the movie Waking Life, which is basically a philosophical questioning of the nature of reality... Don't know if such a manga exists, but I'd love it if someone could recommend something even vaguely like it!
Other scenarios that might apply:
The protagonist experiences "reality jetlag" after returning to the so-called real world after time spent in VR;
A Matrix-like manga in which everything we think of as real is actually NOT real;
The protagonist is just plain crazy and therefore has hallucinations that aren't real, but seem like they are;
The protagonist has really vivid dreams/flashbacks that "bleed" into daytime life and cause disruptions;
There is some sort of mass hysteria/delusion affecting the general populace, and the protagonist is the only one who sees (or thinks s/he sees) the truth;
The protagonist has spiritual/out-of-body experiences that conflict with normal notions of reality;
There is another world underneath/running parallel to our own, that we just don't know about but is actually just as real (e.g. Narnia or Torchwood).
... Lol, you get the idea. These are just some possible scenarios for reality-bending manga.
Any recommendations? Absolutely any genre is okay, except hentai or ecchi. Shoot!
