He easily slips it off her arm

Mackenzie's heart pounded and her mind raced. Fuck the test, fuck whatever the hell's going on, I just need to get the hell out of here! was all her mind could come up with. That was when the redhead realized that she was still leaning forward on her forearms. And, more importantly, that was when she realized that her skin-tone bra was still unclasped. It remained vertically dangling straight down from her shoulders, leaving Mackenzie's slanted torso free and clear of its last form of cover. Her voluptuous breasts were in view for the class to see, clear as day. Well for anyone seated to the left or right of her at least. But those who luckily were in those prime seats they were treated to a wonderful side view of Mackenzie's boobs.

The redhead involuntarily stiffened in shock as she realized her newfound exposure, quickly leaning back so she was sitting straight up again. Her bra cups obeyed gravity and swung back onto her breasts, providing what meager cover they could for the nearly naked girl. As a blushing Mackenzie self-consciously crossed her hands in front of her chest, she covertly looked around the room, and she didn't like what she saw. Mackenzie noticed that almost everyone was now looking right at her! Her face reddened even further as she resolved to, at the very least, refasten her bra. But what the alluring girl didn't notice was that, in her rapid motion to sit upright, her right bra strap had silently slipped off her shoulder, sliding down her arm.

Mackenzie reached both arms behind her back to refasten the bra, inadvertently slipping her right arm out of the bra completely! With just the left strap holding it in place, the undergarment swung away from Mackenzie's impressive bust, dangling from just her left shoulder. A collective but muted gasp ran through the class as Mackenzie's chest was bared in earnest for nearly all to see. The unwitting girl had just rendered herself virtually naked!

Several seconds too late, Mackenzie realized her mistake. Instinct took over and she hastily clamped both hands over her bare breasts. Which, in turn, was enough to send the left strap sliding smoothly off her shoulder, falling down her arm rapidly. Dangling from just the crook of her elbow, the garment could barely still be classified as being on Mackenzie's body.

Zack, who had been racking his brain for ways to slip Mackenzie's sole remaining article of clothing off her beautiful body, noticed the display in front of him and couldn't help but chuckle to himself. Wow, she really is making it easy for me, he thought to himself as he leaned forward in his seat. But if it's plausible deniability she's after, who am I to say no?

Mackenzie, meanwhile, was still sitting there in stunned disbelief, desperately keeping her breasts out of sight from her leering classmates. How the hell am I gonna pull this back on without exposing myself even further?! she wondered to herself with no small amount of worry.

She needn't have worried. Well, about how to redress herself at least. With one final yank, Zack whisked the skin colored bra right off Mackenzie's arm, tearing her hand away from her left breast as the undergarment slipped off her wrist entirely. Mackenzie quickly returned the hand to her left breast, almost numbly. Zack furtively dropped the bra into his bag to join the other prizes he'd torn from Mackenzie's body.

And that was it. Mackenzie was left wearing nothing but her socks and shoes, despite having walked into the classroom an hour earlier wearing a complete outfit! She couldn't believe it. She was stuck taking her midterm naked!

This is a nightmare, she thought to herself. This has gotta be a nightmare! There's no way this is really happening, right?! But after a few more moments of failing to wake herself up, Mackenzie slowly began to accept her reality. She debated what she should do in an unimaginable scenario like this, and only one answer came to her mind. She had to get out of there!

Mackenzie grabbed the test and her small backpack, her only two forms of cover now, and held them tight against her pale skin. Her backpack was thankfully large enough to cover both her breasts when she hugged it to her chest, but not much else. Her test, likewise, was strategically placed in front of her crotch, hiding her womanhood from view for the moment. As Mackenzie turned to her side and stood up from the desk (trying not to think of how half the classroom was now getting a spectacular view of her curvy ass) she caught the eye of the boy behind her. Zack smiled and winked at her, happy to have helped the "shy streaker" in her stripping escapades. Mackenzie blushed and glanced around his desk, desperately hoping to find one of the pieces of clothing he'd stolen from her. But Zack had stashed his prizes too well, and they were all hidden out of sight in his bag.

With no small amount of resignation, Mackenzie turned to the front of the room and began hastily yet quietly walking up to the professor's desk with her meager forms of cover. And even worse, upon arriving, she had to relinquish one of them. The naked redhead plopped her exam onto the desk, causing the professor to look up from his book just slightly for a moment before he resumed his reading. Not wanting to spend another second in that room, Mackenzie covered her pussy with her hand, and headed for the exit as quickly as she dared. She expected to suddenly hear the professor shout something at her, but he mercifully seemed too distracted to even notice the naked girl just feet away from him. The same wasn't true for the rest of the class, however, and every student in the room was transfixed by the sight of Mackenzie's pale skin and uncovered ass as she fled the room.