@tooecchi Yeah, figured it's from some other doujin. Just linked it here because this is the only suemi junkyoutai gallery we have. Only so you can find that page for the unlikely case it is needed
Dnkz, I'm not sure to what book that backcover belongs but I strongly doubt it belongs to this book. This lacks a scan of a back cover but it's also vastly incomplete and is an old bad scan. It should be rescaned but I'm sharing old scans that I organized years ago and downloaded even many years earlier.