This is an amazing manga and definitely a hidden gem. Anyone who loves a good plot should read it! Heck, anyone should read it! It's that good.

Story: 10
The plot is great. It's solid and very well-crafted. There are tons of unexpected twists and the story just keeps pulling you along for the ride. Little nuances you wouldn't notice in the beginning pop up later to have meaning.
There's plenty of action. The magic in this story is pretty cool. Romance doesn't play that big of a role, so don't expect a bunch of fluff scenes.

Art: 9
Art is enjoyable to look at, but some characters look very similar. It takes a while to identify who's who (other than the main characters) and even then, sometimes you still can't.

Character: 10
Great characters! The main character and other important ones are all quite likable. No shallow characters. Everyone has a pretty solid personality and there's definitely character development.

Overall: 10
This was a great manga. The plot, the characters, and everything came together very well. The plot especially made the manga very enjoyable. It's different from the shoujo mangas that just follow the character's daily and dramatic lives, or the shonen mangas where characters just keep battling each other and nearing death.