The panties are loose on you

You and the girl sneak out of the hall to the bathroom. Quickly, the girl pulls down her pants, showing her cream colored underwear. Indeed, it is wet in the crotch part. Then she pulls that down too, revealing her pussy which is also still wet. Judging by how it still looks slimy, she lost her control not too long ago, it seems.

"Here you go." She hands the panties to you.

You quickly put them on. You realize how they feel really loose. You see the girl's butt jiggling around as she puts on her pants back and now you understand why. Her ass is much, much bigger than yours.

You curse your petite frame in your mind.

You try walking around with your new pair of underwear. You notice how they seem to slightly lower with each step you take. Quickly, you adjust them back. But no matter how many times you readjust them, they keep falling off from their proper place.

"Oh, I'm sorry. It seems they're a little too big for you, aren't they?" the girl asks.

"Y-yeah." you answer.

"Well, just don't do any **** movements and they'll be fine," she encourages with a smile.

Her encouragement, however, backfires as you realize just how in the world you're going to do your demonstration with loose panties like this. You can't do your advanced moves unless you want them to fall off right when everyone's watching.

At any rate, you return to the hall as soon as you can, readjusting your panties a couple of times when they get too low for comfort. You thank the girl again for her assistance. You introduce your name, and afterwards she introduces hers. Her name is Rosa. Rosa Etherblanc. Like you have suspected, she is indeed a noble. Not a big one though.