A relatively short read that tugs strings but does not have crisp art needed to back itself up.
The characters were good, I particularly liked Tsutuji's simple motivation throughout the series, namely saving his crush Mizuno. Contrasting thus against the more grandiose delusions of other characters in the story served as a good counter to the phrase "the needs of the many outweigh the needs of the few", namely that, for any one perosn, they will prioritize their loved ones over strangers. In that vein, Tsutuji fought for his loved one rather than the town, an abstract concept.
Where the manga was weak is artwork. The rough style muted intense battle scenes and emotional plot points, which this manga has both of. I also found the ending, specifically the very last page, to be odd, almost like a cheap joke to insult the reader after the emotional climax. This lowers the experience of the manga as a whole, given the ending is what one remembers the most, or at least more so than 80% of a manga.
I've seen better, but this is still good horror that didn't rely on gore for its horror aspect. 7/10.