I'm a librarian who loves anime, manga, and reading a wide variety of genres.
This came before volume 1, of course. Ugh. At least I get to have this for a little over a month, so volume 1 has some more time to get here.
After a bit of research, I learned that I've read one of Usamaru Furuya's other works, Lychee Light Club. Which immediately made me worry even more about what the No Longer Human manga would be like, since Lychee Light Club is the kind of strangely beautiful grotesque horror that burns itself into your brain.
Flipping through this volume of No Longer Human, I can see that same strangely beautiful grotesqueness, but it doesn't seem to be quite as intense here. We'll see if I still feel the same way after reading it.