You have been raised a good kid and know that the all the clothing in this room was either slutty or inappropriate in other ways.
However, you've always wanted to know what lies inside a girl's undergarments. Just for the fun of it, you walk over to the sexiest thing you see, a sexy set of lingerie. It is a see-through black mesh set of panties and the most inappropriate DD cup bra you've ever seen.
You take the lingerie off of the wall and look at it. For some reason, you don't want to do this for the fun of it anymore. Instead, it is as if you can't wait another second to put it on as its sexiness getting to your head.
You slip on the slutty panties, and as you do, you feel a shock, like electricity, go up your spine. It is strangely comfortable and fits like a glove, though it is tight around the groin area. As soon as you finish adjusting the panties, you put on the massive bra. It is not as comfortable as the panties, probably because you don't have breasts. Wait, don't you have breasts? You quickly start to wonder how this thought even popped into your head, and conclude, no, you don't have breasts, and it is probably just because the thought of wearing girl's clothes-ad very sexy ones at that-is getting to your brain.
However, even though you know that boys don't have breasts, you can't resist looking and glance at your chest. Shockingly, you see two small mounds slowly growing on your chest, which somehow lost all of its hair and is now smooth and flawless.
This shocking observation triggers a shockwave of pain throughout your body. You collapse to the floor, screaming in pain. You can feel your chest skin being pulled to breaking point, but your chest never rips open, it only grows even more.
You butt and sides feel the same way, and just as you feel you are about to explode, the pain stops. You stand up, traumatized by what just happened, and then realize that the changes haven't stopped.