Dubfan

(Spoiler Free Review)

Major objectionable content (TV-MA).

This anime is certainly engaging. It was not hard to watch it all in one day, however the show falls short objectively. The plot is continuous from start-to-finish (which is nice), but there is no clear goal in mind. There are a number of loose ends. Perhaps the anime is a prequel to the story portrayed in the light novels.

I couldn't really get attached to any of the characters. They are not relatable in the slightest. There is "some" character growth, but not too much.

The main reason for this anime to be for mature audiences is that it does not spare the horrors of war. Although, a little light on some aspects, it is heavy on others aspects. 

Animation and sound are very well done. The opening is very enjoyable.

All in all, I rate this anime 6/10 -- Above Average. If you've got the time and like dark action, give it a watch.