I've read way too much shounen.
The artwork is pretty nice, especially near the end with the summoned whatever. It's just, otherwise... by the numbers. The only thing that stood out was that the uh... deuteragonist, was a chunky boy. If it became a serialization, I'd say it's a tossup whether it lasts thirty or so chapters or goes the distance. The author would really have to power up with the story telling or have a really on-point editor.