>>2895309There's a scene in Prisma Illya (anime version, I don't know about the manga) where several of the main characters are wearing yukata at a festival and one girl mentions that she's tricked another girl (who's a foreigner and needed help putting it on earlier) into wearing hers without underwear. A third girl reacts with surprise and moments later a plastic bottle or something inexplicably flies out of nowhere and causes hers to come undone, revealing that she is also without underwear.
It's very brief, however, and the whole thing is forgotten by the next scene and also the first girl that got tricked is never exposed at all.
Pic extremely related
