Laughing to yourself, you grab a small skinny piece of fabric from the top of the pile, gazing upon the tiny black thong. You were never into crossdressing outside of some normal curiosity, but for some reason your eyes couldn't tear themselves away from the small piece of fabric.
"What the hell," you say to yourself, chuckling. "It'll be interesting to see what I look like with this thing on." You stuff the thong into your pocket and slowly make your way out of the closet. Checking to see that the hallways are clear, you tiptoe towards a nearby bathroom, locking the door after making certain no one was inside. Once there, you toss down your bag and pull the thong from your pocket. Laughing again at the sight of yourself holding a thong in the mirror, you mutter "This is so ridiculous." Shaking your head, you proceed to undo your belt and slip out of your jeans, before pulling your boxer shorts down as well and casting them aside. Taking one last breath before the plunge, you step into the thong and pull it up as tight as you can against your body.
Surprisingly enough the thong seems to fit, though the huge bulge in the front makes it clear that the article of clothing is not suited for your gender. It actually doesn't feel too bad having the thong on, you decide, and you briefly contemplate leaving it on all day just to see how it feels. Glancing at yourself in the mirror, you eventually decide against it, as risking getting caught would be too great. You start to reach down to remove the thong, when a wave of coldness spreads outward from the article of clothing.
"The hell," you tell yourself, before glancing down at your legs. To your amazement and horror you watch as the hair on your legs starts to fall off, at first a few strands at a time but quickly evaporating in large amounts. A quick glance at your arms tell the same story. Frantic, you toss your shirt off and glance down at your chest, shocked to see the same result on the fledgling chest hair you had been growing the last few weeks. You shake your head in denial when you look down at your hands. You see the fingers getting thinner, longer, and much more feminine looking. Your nails slowly grow outwards a few centimeters, coming to a stylish point at the end. Realizing what is happening you rush to remove the thong from your body, before the changes become any more far gone, but as soon as your newly feminized hands touch the nylon fabric you receive a jolt of electricity that causes you an instant of pain. Recoiling back, you can only watch in horror as the muscles in your arms slowly wither away, leaving smooth, finely toned skin in their place.
"This can't be happening," you say to yourself, coughing a bit as you feel a tickle in your throat. Sweating, your run your hands through your hair, before you stop as you realize that a few moments ago, you didn't have hair long enough to run your hand through. A quick glance in the mirror confirms your horror, as you now have hair growing out of your scalp in long waves, before it hangs down to the small of your back. At the same time your hair begins to lighten, becoming a light blonde in a matter of moments. You watch in agony as you slowly shrink down, losing a few inches of height, while at the same time your legs become longer and more shapely. Your feet shrink in size as well, to match your, admittedly, hot pair of legs you now possess. You glance back up in the mirror, just in time to see your shoulders slim down and your waist slowly collapse inward, giving you a well defined hourglass figure. You can't help but have a few tears leak out as your face rearranges itself as well, becoming a thing of feminine beauty. A loud crack in your back causes a sharp jolt in pain as your chest naturally juts outward, and your hips violently widen to finish off your new curvy shape. You let out a groan in your new soprano voice, your Adam's Apple having long since vanished as well.
With a resigned feeling, you watch helpless as two orbs of flesh grow out of your chest. Larger and larger they grow, looking ridiculous on your small petite frame, a counter balance to the large feminine ass that the thong now resides on. You have little idea of the size of the breasts, but you no they are by far the largest pair you've ever seen up close and personal. You feel a churning inside your gut and look down at your package, crying again as it slowly shrinks into nothingness. With another wave of coldness, you feel the transformation in your body stop, and a tentative touch of the thong doesn't create another electric shock as before. Frantically you remove the offending piece of clothing and confirm that, in fact, your once proud manhood as morphed into a female slit. Turning towards the mirror, you try to decide what to do next.