This is one of the kind work that you probably should check out because there's nothing quite like it. It is a comedy, a tragedy, slice of life, horror, sports and bunch of other genres mixed in, with a rather complex overarching story and fairly large cast of characters. Art style is quite uncommon too, and in the age of simplified visuals, child-like or teen-like characters, the visuals are different - while this is certainly manga style, it heavily uses black, it is a bit messy, and on realistic side. It resembles works of Nihei Tsutomu (Blame!, Ningyo no Kuni, Sidonia no Kishi) due to its focus on more realistic visuals and "fuzzy" sketch-like but highly detailed drawings. Another thing that stands out is its rather bizzare world which is slowly unfolding for the reader.

Overall I felt that the story could, in places, have more impact and I felt like anime adaptation presented it in a bit better way, but uniqueness of the setting, black humar, different art style, and complex story along with likable and believable characters balanced that out. So I can say that I enjoyed this one.

It should be mentioned that this manga contains violence, gore, dismemberment and nudity, but mostly there's a lot of horror gore and black humor, which may not be to everybody's liking.

I recommend to check it out if you have the opportunity.

7/10 Story, 7/10 art, 8/10 character, 7/10 enjoyment, 8/10 overall (due to it being very unique).