This is "Omoshiroi Hanashi, Atsumemashita. R" from Kadokawa Tsubasa Bunko. I've read it several times, so there's a lot of wear and tear. The top part of the cover is a bit bulky, so it seems slightly crushed, but it's hardly noticeable. When I tried to take pictures, I noticed some stains on the edges of the pages (see image), but I don't think it affects the enjoyment of the book.