Quite a good manga we've got here. The first volume is a bit introductory to the process of astral projecting. In the proceeding volumes, we've got various topics that are touched - otakus, nuclear warfare, terrorism, computer addiction. It is explained in a very intelligent and yet straightforward way the harm or the negative effects of those modern phenomena. In other words, this manga has a philosophical touch which was quite appealing to me. Also, the art is quite good - a bit like the art of modern comics but more realistic.

If you like supernatural and/or psychological, you'll love this. Of course, it goes without saying that if you're into astral projecting as well, you'll pretty much adore this. Also, it's worth mentioning that the United States are quite a frequent subject of this manga - their policy, their ideology and their goals are mentioned on numerous occasions. So, I think american readers should be able to enjoy this manga very much.

This is deep stuff. It's like reading one of those gothic graphic novels. It tries to explain the otaku phenomenon from psychological perspective, and also relates it to previous similar boom and pop culture.
I didn't manage to sort out what was happening between the sister and the protagonist, the dialogues doesn't seem to connect.
After some reading, you'll get used to the art, and find it very suitable to express this kind of story.