This story is totally.. fucked up. But once you start, you won't be able to stop.

It's unique because of the characters, I suppose. They all have their own obsessions and won't give up. The most normal person I guess might be the main character, the girl (I don't remember her name).
There's a lot of love, love everywhere. I guess that love is the thing that makes everyone go crazy. The manga is, basically, a reflection of the real world but with a lot of exaggeration.

If you want something different, try it.