Good news! There's extra content for this manga. Each of the volumes has a short extra chapter (10 pages), 2 character pages, and 2 mini-comics on the other side of the character pages which I think are Kako/2chan Q&A? My guess is the scans here are from the Waai! / magazine release, so this extra content was missed.
Have gotten my hands on the volumes and scanned them, but I don't Japanese, so if you're a translator hit me up!! Unless they are already uploaded and readable, by the time you read this.