It looks like a “T” was added to the product pickup counter at Tully’s Coffee in Corowa Koshien.
(Photo and info provided by mama nayuta and Taa. Thank you!)
Here it is↓

That T shape definitely looks meaningful. Maybe it’s that thing after all.

There was also an autograph from Kei Igawa!!!!

Yep, it’s that
※Thank you to mama nayuta and Taa for the tip!!
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