Just a quick review since no one else has made one yet.

Pros: Interesting idea/concept for the story
Decent execution on said story
Decent gore scenes

Cons: Art overall is a bit sub-par
Way too many characters for only 3 volumes/17 chapters. Hard to get attached to really any of them.
Pace can be a bit too quick (a reason why the number of characters is a detriment).

Overall a mildly interesting read. Would recommend for something to pass the time, but shouldn't really be a priority.

And now, since MAL is saying this needs to be longer: Have a good day.