While the story is slightly weak in what its about (save the world) how it tells it is rather interesting. I can say that because the main character is in many ways one of the most rude characters I have seen. Not crude or mean. But rude. Deep down he has a good heart though.
Basically it takes place during a time where martial art's rule the world. No real "magic" per say. Just lots of strong spiritual force is abound.
If you like Martial arts, and don't want to have a "perfect" main character. This is a manga for you :)