Just saw your tag for post/115173685594. I think that costume was from the "drama" version of Manatsu no Sounds Good, from the scenes where all the "old" members were all injured and stuff.
Ahhh yes, you’re right! Very cool that they put that on display. Man, I wish I could’ve gone to see the costumes in person. It’s truly amazing how many outfits the costume team creates.










