tl;dr: A manga with a story told so badly it's hard to even judge the story itself, though it does have good art. 

There may be a good story somewhere in this manga, but it wasn’t conveyed well in this at all. By that I don’t mean that this is one of those stories where it feels like the story has a lot of potential but the adaptation didn’t do it justice. Rather, I have no clue how good the core story is because it feels like the manga didn’t really tell it at all. Essentially nothing gets fleshed out in this manga in the slightest. The world is lightly explained in the beginning, but only at a superficial level that doesn’t really count as world building, I would say. The mechanics to the combat or magic aren’t explained at all really, and hence any time anything happens it just feels arbitrary. In effect, the plot itself seems completely random too. Sure, there are some cool moments, but the context isn’t developed well enough for them to have any impact. Similarly, there are times that characters seem amusing and likable, but holistically the cast of characters isn’t really developed at all either, and thus overall this likability is in passing with their personalities and such not being memorable at all. Thus, all in all, even for a three volume manga it feels like very little happened and what did happen wasn’t that important, which as an introduction for this sort of manga is makes the entire thing seem pointless. The one thing that was good about the manga was the art though, wherein it got a bit too hectic during action scenes and the style itself was often too busy, but the art quality and character designs were all pretty well done.