Yeah, maybe it was not a hot day.
Because stuck in elevator in a hot day is a deadly situation.
Also, Suzu is able to feel embarrassing, so cute.
Also a reminder : elevator has camera, so yeah, they changed in front a camera.
I don't get what's embarrassing though, if I was stuck in a hot elevator with a beach ball I wouldn't let anyone judge me for bouncing that thing around. And if it's the swimsuits that are embarrassing, if they are embarrassing in one public situation, why buy them to wear on a public beach? Kinda stupid in the logic department in my opinion.