Let him cast it.

You don't know what he's planning and it isn't your business. You aren't a mage. If something goes wrong, you're not to blame, so you sit back and focus on the lesson as complicated as it may be. That Joivus is a trickster. Maybe it'll be funny anyway. He could just be planning to flick someone on the back of the head, though preferably not you.

You then see a floating hand appear behind Professor Quigwyn. With the precision of a ninja, it not only pops the back of the professor's brassiere, but it quickly whips around to the front and yanks it free from the top of her cleavage. In one swift motion, the spectral hand removes Quigwyn's crimson bra and dangles it five to ten feet in the air above her head. The class gasps, and many giggle wildly.

Frustrated and embarrassed, the professor panics and starts to jump at the floating bra with both hands, trying to snatch it quickly and end this madness. You watch her D cup breasts bounce up and down with her, nearly popping completely free from her dress. Blinded by desperation, she keeps bouncing up and down, but the hand just raises the bra slightly out of reach each time.

Through the front of her outfit you see her nipples barely poking against the fabric. At the final bounce, you swear you see a glance of one just barely popping free. The bottom of her dress shifts around her legs, and for a few moments you can see the matching pair of dark red panties. They look thin, at least they did by the short glance you got.

She finally stops and covers her cleavage with her arms. Her freckled face is completely flushed red and her eyes twitch with anger as she scans the room, but it doesn't take long for her brown eyes to stare at the gnome next to you.

"Joivus Pibbleskip!" she screams.

"Uh oh," she shifts his eyes and drops the spell and the bra. The garment hits the ground beside her.

"You've been a trouble maker in my class too long! I'm talking to the Headmaster about this, but for now, please leave my class!"

Still weirdly polite even when she's shouting... Joivus gives a sly smirk and hops down from his seat. The chair lowers magically back down to an ordinary height and the gnome shuffles out the door, leaving an awkward silence and an embarrassed teacher in the room.

"P-Please forget that happened," the says quietly.

You know that isn't going to happen. At least a couple phones were taken out. It happened so fast, someone probably got at least a crappy picture of the event, and in memory, you're definitely not going to forget. That was something else. Mathematics isn't so bad.

"Now pardon me for a moment, " she adds as she bends down to pick up her bra.

You watch as her giant cleavage dangles forward for a moment, but she pulls herself back up and conceals her chest with both her arms as well as her bra, and she quickly makes her way to the door and departs.

After a few moments, she walks back in a little more confident with her undergarments in tact. She then continues the lesson. She goes on and on, and you catch at least some of it, but after an hour and a bit passes, it finally comes to an end.

"I'll see you all next time," she says as she waves to the class. "We better not have more trouble in the future."

Snickering is heard among the students departing. Eventually, you're the last one to begin walking towards the door. You look back at the professor who seems pretty steamed. Maybe it's best to leave her be for now.