First of all, don't judge this manga based on its synopsis. In one word this work is in my opinion outstanding.
The story at first seems ridiculous (and I didn't want to read it at first for it), but as soon as you get into it you can't stop reading what will happen next.
The personalities of the characters are very well fleshed out, with their strong and weak points.
The art is very good as it is.
I enjoy reading this manga and look forward for more works from its author.