As I mentioned it, when I shared Momojiri Danchi Mama-san Volley Doukoukai one month ago, the presence of a duplicate image was hinting at a mistake and, perhaps, the existence of a missing picture.
The releaser has indeed, later on, added that missing picture to the volume.
With a slight delay (cough), I’m following suit: the zip and gallery links were updated, but of course, don’t waste your bandwidth and time, you can simply download the additional picture right here 