Pulling your gaze away from the necklace, you look around the room. It's...different than before. Cheerier, more feminine. Not too much so, thankfully, but still notably different from your old room, with its jumbled bedclothes, piles of dirty laundry, and possessions scattered about.
Opening your closet, you find both relatively gender-neutral and exclusively female clothes; jeans and T-shirts are intermingled with skirts and blouses. Again, though, none of it is overly pink or frilly, and the available underwear is plain, no-nonsense stuff.
You look at the necklace again. Nothing seems to remain of the strange sensation it gave you yesterday; perhaps it has lost its power. It's interesting, you think, that something so small and unremarkable could have wrought such drastic changes in your life overnight. If it changed my clothes to match...my...new body, you think, and it changed my room, what else did it change?
You look again at the girl in the mirror. You're wearing only a thong; weird, that doesn't seem to fit with the rest of the clothing in your wardrobe. It's just too weird having something so small covering you privates, so you hesistantly pull it off, and are about to try on a pair of panties when there's a knock at the door of your room.
"Wake up, dear!" your mom's voice says. "Hurry, or you'll be late for school!"