This is it: the finale to this rather short but very interesting series. We finally get the answers as to why Rintaro is in hell, something that I'm sure that most readers were intensely curious about it. It's heartbreaking when you read it and I have to give Suzumaru credit in that he was willing to go as far as he did. You don't see anything and perhaps that's what makes everything so queasily surreal and horrifying. It's left up to the reader to picture the scene, try as hard as you might to NOT picture it.
The artwork here is pretty well done, although I'll say that the best parts are usually when Suzumaru is trying to unsettle the reader by showing the horror of a certain human being or how gruesome a devil can actually look. It's kind of jarring in comparison to how cutesy some of the artwork can be at times, which gives off an uneasy feeling.
Story-wise, things tend to go fairly quickly in this volume as Suzumaru tries to wrap the story up and come to a satisfactory conclusion. It probably could have extended for at least one more volume, but I'm happy with how things progressed and I think that this probably wouldn't have fared very well by being one of those 6-7 volume tales because the story here is pretty limited once you get down to it and lends itself better to a shorter format.
If you've bought the previous two volumes, this is definitely worth getting. If you're still on the fence and were waiting to read opinions about the last volume before diving into everything, I give it my recommendation.