In the middle of the typical retelling, which perhaps is not as dull as most of them, we find this:

Apparently after eating her hamster’s lunch (um, what?), it got mad at Hibiki and ran away. They go after it and we see some other idol and Makoto in the kitchen.

It is Yukiho! YUKIHO HAGIWARA. Seriously, people, she was in Xenoglossia -- with ridiculous boob pads, but...

... oh. I see what may be the problem.

P.S. On the other hand, if Yukiho sees Producer one too many times, snaps and goes on rampage... Anime of the year, right there. Thank you, Evirus, for giving a voice to the "part of me sincerely wishes" line.