"I'm sorry, matron!" You stammer, wiping the cool water from your lips. "I'm not here for a test, I only needed shelter from the sun and some cool water."
The beautiful woman sighs. "Very well."
With adder-speed she raises her arms and spits an incantation! Everything goes dark.
When you come to, you find yourself sitting down with your feet in front of you, clasped in stocks, and your arms manacled over head. A leather gag tightly covers the whole bottom of your face and the desert sun beats down mercilessly. Sweat beads and runs down your nearly-naked body. A sign nearby reads "Please see this sorry excuse for a wizard home safely. Or ..." Near the sign is a barrel filled with feathers of every shape and variety.
You struggle against your bonds as you hear voices in the distance, and see figures emerge over the ridge! It is a couple of senior apprentice girls; one short, with cheek-length, blonde hair in an airy, flowing robe of crimson, the other a tall and muscular girl, with long, black hair, and a sheer white robe. They notice you, go silent, and approach.
"What do we have here?" Asks the girl in red? "A sorry excuse for a wizard?" She remarks, reading the sign.
"And what about these?" Asks the tall girl in white, drawing two long, stiff feathers from the barrel."
You shake your head desperately and plead into your gag. You're in way over your head!
The blond chortles and grabs two feathers from the barrel as well, as they both approach your struggling body.
"Well, little wizard, let's see what my spell of Incredible Sensitivity can really do?" says the blond as she raises her hand in a malevolent gesture!
The words of the spell strike terror in you. Immediately you feel every breath of wind on your body! You begin bucking and screaming before either girl even touches you with a feather.
Laughing maliciously, both of them lay into you; one twirls feathers over your nipples and darts into your arm pits while the other saws between your wriggling toes. Every nerve of your body reacts one-hundred fold; you scream into your gag, writhing and struggling, but the girls only laugh.
In a moment of sheer cruelty, the woman in white yanks your sweat-soaked briefs down to your knees. She drops her feathers and attacks you with both hands; one hand sliding between your legs, toying with your ass, while the other runs its thumb up and down the underside of your shaft. You groan and shout into the gag, your voice growing hoarse. The blonde tortures your nipples and armpits with the flicking feathers as you thrust desperately against your bonds.
You groan and pant, near-climax from the over-stimulation wracking your body when the girl in white quickly pulls her hands away, laughing. Taking the queue, the girl in red drops her feathers, while you shake and quiver, pleading desperately under the blinding desert sun.
"Well that was fun." Says the blonde in red, looking over the desert horizon, completely ignoring you.
"Fun enough," says the dark-haired girl, as you mmmmmpppph and beg "On to our test then?"
"On to our test." Agrees the blonde. You writhe and squeal desperately as both girls continue into the desert.
You buck and groan under the desert sun, covered in sweat, about to burst. Eventually, a less malicious student finds you and, with some humiliating chiding, sends you back to the Material Plane.
You probably aren't meant to be a wizard.