Story 6/10 - Hmm... it's an interesting take on what has been used many times.
Art 8/10 - Nice and a fine art style, definitely a redeeming feature. However, certain faces often look like clones of each other, so negative for that.
Character 6/10 - Again, kinda interesting, but cliche all the way.
Enjoyment - Friend lent me first volume, next day bought all 5 volumes on a whim.
Overall 7/10 - Not a bad read, but it won't be stringing you along in anything special.

First of all, I'd have to say that the story is very and I mean very reminiscent of ''Alive'', another manga which has a very similar plot device. Ironically both titles never managed to gain mainstream media attention even though they tried very hard. So if you have read ''Alive'', you will feel very much at home here.

Basic lay-it-down-to-me plot of both titles (possible spoilers)... The nation one day becomes infected with a strange disease, where everyone starts dying or killing each other on mass. Main character somehow overcomes the disease to some degree, lose the girl and goes on a journey to become stronger fighting off strange organizations.
Having said that, it's also very similar to Kiseijyuu and Tokyo Ghoul; probably another half a dozen other titles with similar plot lines...

Simply said, it's nothing new. Fortunately, the story is rather well paced. There's not too much going back and forth, making needlessly confusing turns, it's rather straight to the cut and simple. The story advances at a nice steady pace, which can also be a bad thing. As most manga titles tend to have their climax at the end of the chapters, this title keeps the climax in the center most of the time. Which may be a turn down for some people. Personally it was kinda refreshing.

Art. Hmmmhm. The art is very nice. Easy to read. Not much to complain. Except for one flaw. Male characters tend to be a bit more varied in terms of facial design, however female characters suffer from the ''same face'' syndrome, where it looks like the same person with a different wig. It's not really bothering too much, I just personally take more attention to the art, so occasionally I see 2 different characters and notice they look identical. But shouldn't be much of an issue for most people.

Character... Fair I guess. Nothing special. Pretty much like every other main hero. Lame and bland high school student with a obsessive trait. It's sorta like, you know who everyone is before they are properly introduced. Not a bad thing really, but as you know what to expect, the character development (where there is a pretty good one) becomes poof. It loses it's meaning.

Overall, I really enjoyed reading this *overlylongtitleIrefusetowrite*. The art can be eye candy sometimes and the story has it's interesting parts despite part of it being fairly obvious. Will I continue reading? Yes, but it's probably one of those titles I completely forget about along the way, only to start reading it again in a year or two. Just like how ''Alive'' managed to barely stay alive.
I think this is an (not underrated), but rather under appreciated. If you have some time to spare, take a look. Might be in for a good ride.