Flailing around, you sputter and finally make it to the surface. Gasping for lungfuls of air, you feel wet, very wet. In fact, so wet that you can't feel your clothes, not even shoes. It's like they disappeared. The water got in your eyes, which burn, so you squint to see the edge of the lake and swim as rapidly as you can for the shore.
Pulling yourself up onto the moss and grass, you realize from the itchiness of the flora that you are indeed missing all your clothes somehow. Finally, you reach up and rub the water out of your eyes. After blinking a few seconds, you look down, only to find something else is missing as well: your breasts. In fact, all that is there are some very well-defined pectoral muscles, just above a six-pack of abs, which you definitely did not have before. However, something else you did not have before is below that.
Staring in disbelief, you reach for your chest and touch it gingerly, confirming this is no dream. Dumbstruck, you whirl around and stare at your reflection in the lake. Which now belongs to a rather handsome, well-built, muscular - and naked - male. Standing up but still staring down, you run your hand up and down your body, still not daring to believe what your eyes are telling you. However, when your hand wanders to your groin, you find you cannot deny the truth. You are no longer female...in fact, you are no longer really you. Who you are now, on the other hand, is a complete mystery.
After standing around staring at your new male self for god knows how long, you finally realize you cannot stay here naked in the middle of the woods while the sun goes down and who knows what comes a-hunting. Looking around for an indicator of what direction to go, you spot something near a bush along the edge of the lake. Heading towards it, you find it is an outfit, which surprisingly, looks like it was made to fit the body you are currently in. Approaching it, you get a closer look, and find it is...