Recognized the cover art from a mile away on the front page. I can't believe it's that distinct, but I always liked it from when I first saw it in Hiiragi is a bit Careless.
Been a while since I've seen this legendary chapter. I don't remember it having this many pages, but I think I read it when it was listed separately as a one shot.
Seems kinda iffy to include lore in a story like this. The mechanical bits and explanations behind this place just don't seem to add to the emotional journeys and I don't usually ask questions for works like this, unless the author introduces it themselves.
Really glad his next manga was a fighting manga. I always felt he must have really enjoyed depicting those fights in Usogui with all of that flair, now it is the mainstay.