As you groggily come to, you remember what the school officials said before you passed out. This has to be a joke, right? You couldn't really have...
As you lift yourself off the floor, you find that your whole upper body is off-balance. You manage to struggle to a standing position, but you realize with a soft, high-pitched gasp that you have indeed changed. You rush over to the corner of the gym, where there's a mirror on the wall.
You're a girl, all right. A pretty cute one, at that; your new breasts, though not exceedingly large, are certainly not to be sneezed at, and though you've seen girls with curvier figures, you're still quite shapely. Your face has become softer and gentler; it's framed by your formerly short, black hair, which has grown down until it's just touching your shoulders, and become a light golden-brown to match your fur.
Fur? That's right, you have fur now. Not all over you, thankfully; just on your new animal parts. Your calico fur covers your ears, which have grown thin and triangular and migrated to the top of your head. Your jaw drops open in surprise, and you see that your canine teeth have become fangs proper. Your fingernails have disappeared; in their place are retractable claws. Your hands are otherwise unchanged. Your new tail swishes out behind you, apparently having torn through your pants while you were out; it's long and slender, about three feet in length and an inch or so in diameter. A cat's tail. It all clicks; you've become a cat-girl.
You're the first one up, but everyone else is struggling to their feet. Two of the other new girls, thinking along the same lines you did, rush over to the mirror. One is a bunny-girl. Her breasts are large and her figure is very shapely; her now jet-black hair drops partway down her back. She's pretty much lacking in animal features, except for her perky, white-furred bunny ears and a lump in the back of her pants that you assume is her tail. Overall, she looks quite a bit like a Playboy bunny, except that she's still wearing guys' (as are you) and doesn't have the look of a slut. The other is a fox-girl. She appears to be quite the bookish type; small, with large glasses, trying desperately to not be noticed, although everyone is too preoccupied with their own changes to notice hers. Her figure is less curvy than yours, and her breasts are smaller, though not terribly small. Her fiery red hair hangs down almost to her waist. She's the most changed of the three of you; not only does she have the ears, claws, fangs, and tail you do (though hers is a bushy, red-furred, white-tipped fox's tail,) but her hands, as well as having thick black pads on the palms and the inside of the fingers, are covered in black fur, matching the black tips on her ears, which are otherwise read (except for the insides, which are white, as are yours.) The three of you stand there, wondering what to do next.