It's the shoot they used for how beautiful you are and then shown in 'full' in SUPER Ayu sold at the tour. It seems to embody the "Party Queen" aesthetic but it appeared she scrapped the concept when she wanted to do the one we ended up with.
http://www.ahsforum.com/forum/showthread.php?t=112605
They originally planned a photobook too for the same day as Party Queen's release but the entire thing got scrapped until it resurfaced as SUPER Ayu.