Well, overall I give it a 4. I feel that this manga has a good potential to be... great. I liked the characters and the art is good. The plot is interesting and well, it's good...
But, it is too rushed! The reveal the 'secret' of the main character too quickly.. The fight are not very well shown and the whole story is not very well presented...
Like i said at the start, this manga really has the potential to be a brilliant manga, but it has to be longer... There needs to be more 'suspense'. I really wished it was longer and that everything was properly planned out.. It feels like they just threw everything they knew on to piece of paper and didn't plan it. The ending was especially bad!
It isn't a really good manga, but I give it a 4 because the plot and characters were great! There was just so much potential!