Just something I ran across while looking around eBay that we don't have here but there isn't enough to go on to put it someplace proper, so I'll mention it here in the Forum for now.

The item description claims it was available at Hello! Project 2015 WINTER, so my best guess is it's something like a DVD Magazine or DVD Pamphlet concerning the various new members performing for the first time there--though at least from what we can see of the disc, it doesn't seem to mention the new ANGERME members.

EDIT: Google led me to one relevant result at JPLOP, an image saved from an old page of concert goods. Looks like there was a second disc for new ANGERME members and the new unit that wasn't yet called Kobushi Factory.