u/Dull-Wait-519

I'm looking for the anime this Japanese line comes from:

"Kato-san-tachi mo, mo kigaeta n da"

It roughly translates to: "Kato-san and the others have already changed clothes too."

This line has been stuck in my head for a while, i keep hearing it in my mind but I still can't figure out which anime it's from no matter how much I search. It sounds like a casual slice-of-life moment, probably a scene where a group of characters (likely girls) are changing clothes, such as at a hotel, during a school trip, after an event, or something similar.

If anyone recognizes this exact line or knows the anime, please help me out!