They were handing out bags containing flyers, cards, clear files, and more for various productions, so I picked one up and found
a flyer for my favorite idol that I'd seen at summer festivals and other events.
I wondered if it was the same one, but when I took it out...
It turns out they had prepared a version to coincide with the orchestra concert, which had ended!
I'm so glad I got it!! <img src="https://storage.googleapis.com/oshinoko-5xfoy/oshinoko-5xfoy/admin-console-images/1733827466693_21718aae-f361-4544-a4ea-c2e7b525d622.png" alt="" height="28" width="28" fetchpriority="high" class="mx-2 mt-2 inline-block align-bottom">

KADOKAWA distribution items at Comiket | I78's post