I haven't read an extremely large number of manga in my life, so this isn't exactly the most profound statement, but Our Blood Oath is easily the worst manga I've ever read.

Absolutely appalling. Even with bad manga there is always something about it that was redeemable - something about the authors work that you can see being a foundation to build upon with their next work.

I feel bad for this mangaka but my god, it is truly shocking that they were given a chance in Jump at all. Their art is awful - well below what should be acceptable in non-gag manga in Jump. Their storytelling is not just amateurish - its as if this author has never read or experienced a story from any medium.

I have nothing good to say about this manga. I can't even be kind enough to say that any portion of it was mediocre. It was abysmal from start to finish.