Strip her bare on the balcony

"Everyone!" you shout, going out to the balcony. "Can I have your attention?"

The students below look up in time to see Raider coming out with Selma's curvaceous form slung over his shoulder. She's hammering at his back with both fists, shouting angrily and occasionally reaching back to tug her skirt back over her cotton white panties.

"In honor of Big-Boobie Day, Raider will now be baring Selma here for your enjoyment!" you say.

"You will absolutely NOT!" says Selma.

"Be sure to tell your friends who miss this showcase that they can still catch Selma's prodigious dairy-dumplings and those of some of the schools other bustiest girls all through the day at the Raider Big-Boobie Showcase! Okay, Raider: Let 'er rip!"

Raider doesn't need to be told twice. He stands the girl up and shreds her sweater, her shirt, and her skirt, leaving her voluminous hourglass in her undies. Her bra is a heavily put-upon garment, the straps vanishing in places between the folds of her plush flesh, clearly straining to make a grandiose pair of melons look smaller.

As Raider pins her arms behind her, you take her between the cups and rip her bra away.

"AIIIIII-IIII!" Selma screams, doing her best to grab an armload of boob. It's a losing battle; even when one of her oily breasts isn't slipping out from behind her arms, her large nipples are posing a great challenge to conceal.

"There," says Raider, yanking down her panties to reveal her delightful butt. "Now you're naked!"

"Let's go hang this one up and move on to the next girl!" you say.