Too much potential, but did in a bad way.

Marie no Kanaderu Ongaku is a manga about a girl who lives in a strange world and loves a man named Kai who is a strange person.

First, the best thing in this manga is the world and the art style. Both of them combine really well. Is not too realistic, so it creates a sensation of surrealism, because of the strange world they live full of gears and green. Even though the world is interesting, the main focus of the manga is not the world building, so we are not introduced to all the it's caracteristics and cultures or somethings like that.

The story of the manga is not bad, but it was badly executaded. There is a lot of subjects the manga tried to develop, for example the religion, the godness, the relation of Kai and the girl, but none of these were actually really developed in its total potential.

The "ending" too was unnecessary.

Despite all that, it's a good manga and it's not so long, so you can read it in a few minutes. Good way to relax reading something different!