"U-uh, I'm not so sure about this now, Miss Stacky..."

Flintlass gulped as she tugged at her charcoal collar, her left eye looking about the Academy's hallways as she passed. She looked down at her protruding chest for the fifth time; laying on top was her green lanyard, the words "Academy of Swelling" displayed repeatedly in black block letters. Below her breasts, unseen to her, swung her ID card like a white plastic pendulum, a miniature photo of her taken within the first month of classes encased in black outline with her name underneath. Her heeled blood-red boots clacked soundly on the floor as she pressed on.

"Hmm? Is something the matter, Flintlass?" Stacky said, turned her attention to the student walking on her left. The teacher's figure was essentially the opposite of Flintlass', her bright blue button-up conforming to the curves of her ample hourglass figure - one with such wide basins that it seemed to count days, not hours - with a yellow jacket resting along her shoulders unbuttoned.  Brown shorts and orange stockings hugged her wide hips, tapering own to a black pair of dress shoes. Stacky adjusted her rectangle-frame glasses, raising an eyebrow.

Flintlass fiddled with the hem of her shirt, biting her lower lip. "I...w-well, it's...you know, it's me, up there, in front of everyone..." She gulped again.

Stacky sighed, releasing the arm on her glasses. "Flintlass, you did ask for an extra credit, and..."

"'Unfortunately the only spot available is teacher's aide for Puff 101.'" Flint recited, rolling her eyes. "I know." She groaned a little, rotating her shoulder with her opposing hand gripping it. "I'm sorry, I...I guess the stress is getting to me...well, that and the water supply issue yesterday..."

Flint laughed nervously, with Stacky joining in. "Hehe, yeah, how about that..." She eyed the hem of Flint's shirt furtively, trying not to notice how much further it stuck out from the young woman's skirt than it had two days prior.

Flint raised her eyebrow. "Eh? Miss Stacky?"

"U-uh, nothing! Here we are!" Eager to change subjects, Stacky whirled Flint around to face the classroom door, the class name, "Puff 101", emblazoned in white, round lettering below the door's window.

"Y-yeah..." With one final gulp, Flint reached out for the doorknob and turned it, jumping back to pull the door open. "After you, Miss Stacky," she beckoned to her principal. With a smiling nod, Stacky pushed her glasses all the way up the bridge of her nose as she walked in to the awaiting class. Flint looked down at her own figure with a sigh as she stepped in after her.

The classroom was roughly twice as large as one would usually be. The desks, enough to hold 25 students, were spaced a good five feet away from each other, enough room for a student to be two feet away from theirs. The desks took up only half of the room; the other half bore solely a teacher's desk, a chair on its far side and three blackboards along its walls. As the two entered, the class immediately hushed, save for a faint hissing in the far corner from a peculiarly bloated classmate. Flintlass elected to sit on the far chair as Stacky approached the center of the desk. "Good morning, class!" she greeted cheerfuly. The class welcomed her in return as Flint got out the notes she had received the previous morning. "Flintlass here will be teacher's aide for Puff 101 for the remainder of this semester." Flint smiled and gave a soft "Hello" before giving her notes another look-over. "Now, let's continue from yesterday's lesson..."

For the forty-five minutes that followed, the class was mostly theory; the process of getting your body puffed, the effects puffing has on the inside of the body, and even a healthy dose of mobility while puffed. Flintlass made herself useful by prepping notes for Stacky to copy to the blackboards; the water supply incident the day before had made the overhead projectors, and the transparencies for them, next-to-useless until repaired. The note-taking was drawn out enough that Flint found Stacky doodling a Vitruvian "blimp-girl" in the blackboard's corner. She giggled at it, as did some of the students, and went to pull out another set of notes from Stacky's bag, one titled "Puffs by Breath". As she did, something slid out of it with the sound of a maraca. It was a container, slightly larger than one for Tic Tacs, painted half black, half green, with a scrap of masking tape bearing a sole word in blue ballpoint; "Puff". Flint gulped to herself. She tilted the small stack of notes upward and the container slid back in with another shake, and with two steps, she traded the old notes for the new and returned to her seat.

The class marked its three-quarter point as Flint found herself spinning her tricorne hat idly on her pointer finger, when Stacky tapped on her shoulder. She whispered, "I need you for a demonstration." With a nod, Flint stood up, replacing the hat on her head as Stacky led her to the chalkboard. She stood right under the blimp-girl drawing, looking out into the note-taking class. Stacky returned to the desk and dug around in her purse, returning with the container from before. She popped the top open and shook it upside down above her hand, producing a capsule with a bright green liquid within. She pocketed the container and held the same hand out towards Flint. "Here, take it."

Flintlass took the pill in her hand, turning it slowly as to make the bubble within slowly float to either side. "But I didn't bring a water bottle..."

"No need. It should slide down your throat just fine. And...water'd dilute it too much." Stacky bit her lip a little as Flint gulped. "It's fast-acting, so only take in when I say, okay?" Flint nodded as Stacky flashed a wide-toothed grin. "It'll be fine. Remember, have fun!"

Flint smiled in return. "Yeah, thanks." She played with the pill with her fingertips nervously as Stacky made her way to stand behind her desk, leaning forward with her hands pressed down as her bosom jostled. She bore an almost invisible smirk.

"Okay, everyone, pencils down...it's time for a little demonstration."

Flintlass nearly jumped a foot as she heard every student's pencil clack at the same time as they met their desks. All eyes fell upon Flint as she gulped, prompting Stacky to whisper "Not yet!" Flint nodded, the pill now clenched in her hand.