10 Volumes = 49 Chapters (Complete)

This is an awesome series ( I dont know why the rating is soo low). The characters are good, the art is AWESOME (the zombies will make you pee your pants). My only complaint is that its lacking a female character. Im not saying like fluffy romance but a girl would be nice...
I like it so far,
aside from the fact that the zombies talk on occasion. That's the only reason I couldn't seem to give it a higher rating, but enjoyable in all other aspects.
Plot: Nothing to complain. Has the potential to be one of the best mangas in this field. Juvenile prison and zombies? This is really one-of-a-kind.
Drawing: Clean, neat, great style.
Character: Love the 4 main characters. It's the first time that I like everybody from a group. These guys know how to cooperate. Their different individual personalities make them look even cooler.
Other: The names of the chapters are based on songs of really good musicians/ bands, if you know a bit about music.
Conclusion: Read this manga now.