In the gym

In the gymnasium, Mr. Carstairs read the note that Erica handed him and his eyebrows went up.

"Well, isn't this interesting. Yes, I think we can help you out."

The pretty brunette teen smiled shyly. Her asshole was recovering from the anal fisting she had received in the counselor's office, and she was hopeful that her problems would be solved during this third period class.

"FWEET!" went Mr. Carstairs's whistle as he blew it loudly. All 16 boys in the gym stopped bouncing basketballs and made a semi circle around the teacher and the girl.

"Now listen up, you boys," said the gym teacher in his usual rough tone. "Instead of basketball practice, we're going to be helping out Erica here with a problem."

There were sounds of groans from the boys and she blushed hard. Mr. Carstairs put up his hands and made a snarling face.

"Quiet! That's enough out of you lot. And anyway, I think you might quite enjoy this assignment. Because today we're going to be helping Erica by giving her an anal gangbang!"

The groans immediately changed to cheers, the boys pumping their fists and chucking away their basketballs.

"Anal gangbang?" thought Erica, who hadn't read the note before handing it to the teacher. That didn't sound like a very fun way to spend third period. Then again, if it helped her enjoy anal, she figured it would be worth it.

Mr. Carstairs guided her to a gym mat and she got on all fours. He flipped up her skirt and tugged down her panties, taking a moment to admire the juicy sight of her ass. Her anus was still slightly gaped from the fisting she had just taken, and the bright red opening was very appealing.

He blew his whistle again and instructed the boys to make a line behind Erica.

"Alright, here's how this is going to work. Everyone gets 10 seconds in Erica's pretty ass. I'll blow my whistle to tell you when to stop. You pull out, go round the front, and get her to clean you off, then go to the back of the line. The next guy, as soon as I've blown my whistle, you immediately start on her ass. Got it?"

All the boys nodded. Then one put up his hand.

"Mr. Carstairs, how many times are we going to get to go?"

"Oh, right." He looked at Erica. "You'll be rubbing your clitoris the whole time, got it?"

She nodded, looking a little pale. Turning back to the boys, Mr. Carstairs said, "You keep going until she cums. Okay, enough questions let's do this."

And with that, he blew his whistle to start the gangbang.