Lisa wants Erica's panties

"I want what you're wearing under that ugly skirt. Don't tell me you came to school without panties? God! You're such a pervert!"

"Of course not! I got them on... Lisa, I can't do this, I'm already low on panties, just give me the bikini please"

"Like you wear panties every day, you little exhibitionist. I'll tell you what, I'll sweeten the deal, I don't even want your ugly panties, I just need them for safekeeping. Give them to me now, I'll give you the bikini bottoms, and by the end of the day I'll return them panties to you"

"..." I thought for a second "So I'm getting the bikini bottoms now and the panties later?"

"Yes," she rolled her eyes like I just said the most obvious thing ever,

And then it hit me, Duh' I could just wear the bikini bottoms as panties while she had my actual panties and then get the panties later. Now this was a deal I could get behind.

"Ok, Lisa" I shook her hand "and you're not just saying this, right?"

"Pinky swear" she said monotone.

"Ok, let's go to the restroom, so we can exchange them," I said starting to move.

"Not so fast," she said stopping me in my tracks. "you need to take them off right here"

Blushing, I looked around and there were still many students walking left and right. I closed my eyes, put my hands under my skirt grabbing the sides of my panties, and with one quick motion I crouched and dropped them passing my feet over them. I felt a cold breeze under my skirt and on my lower lips as I stood up. My whole body shivered, I frantically fixed my skirt before anyone could see anything. at this point I could already feel my nipples harden under my bra.

I looked up and Lisa was just grinning "Hand them over" she said opening her hand. I dropped my panties in her hand, looking around hoping no one saw the transaction.

"Now... now you give me my bikini bottoms... right?" I said with my trembling hands holding my skirt in place.