This dakimura was sold for a limited time to celebrate Alternative Girls' 9th anniversary (link here). However, the pages on the QualiArts store for the individual products are no longer up. I can only find one image from that page through Google, and it isn't this one.

It looks like the store took the original image from the QualiArts store, cropped out some of the empty space (notice the sample watermark is cut off), and downscaled it a bit (though only to about 7/8 the original size before cropping by my calculations). The original image should still be up on the QualiArts store, but since the product page is down, it doesn't seem likely that the image URL will be found.