OK. Came to this on a recommendation, let's make that clear. This is not my usual taste, and that was the right instinct. I did not like it. It's dark to the point of masochistically horrible. It's not life-enhancing, not joyful, not enlightening, not-fun, IMHO. I suppose you can look at it and at least no matter how bad your life it, it's not as awful as what you're reading/looking at, but that feels a pretty low bar. I'm just not sure why anyone wants this in their head. But, if you do, fair enough - it takes all sorts.
As a purely aesthetic critique then, the artwork is well done, the black and white (mainly black) is drawn well and consistent, but rather monotone - it rarely tries anything daring or new. It's good at what it does, then does it again, and again and again. It just gets a bit boring, but it's highly competent draftmanship.
The writing should get points for ambition, attempting a ballad in the style of a medieval Galliard - at least I assume that was the intent, but I simply didn't feel it was very well done. The rhymes are often forced, the meter is inconsistent, and most problematic of all, if it didn't have the pictures it wouldn't work at all... An illustrated poem should be enhanced, not carried by the imagery. Here the drawings are making up for descriptive weakness.
Several other reviewers make comparison to certain manga, none of which I'm aware of, but simply because it's better than something else doesn't make it great.
Like I said, not my thing, and if you love it, good for you. No offence meant. Simply not to my taste.