Your name is Aidan Ronson, and you're in your first semester of college. You went to one pretty far from your home because you wanted to expand your horizons, and you've been doing quite a bit of that already. You've watched lots of risqué movies with your flatmates, drunk and tried pot a few times (we're not cops, don't worry!), gone to a lot of parties, and most relevant to our purposes, slept around a bit and realised you're bi.
Partly because of sleeping around and trying sex with a few people, you've also started to wonder about whether you feel totally comfortable as a man. One of your friends who you talked to about it suggested trying the 'New You' pills, so you ordered them online, and today when you checked your mailbox they were right there.
Taking them to your dorm, you stand in front of your closet's mirror and undress. Once you're naked, you stare at the pill you picked out. It's bright pink and has a Venus symbol on it, because this pill can change a male body into a female one. For a moment, you hesitate, but then you remember you can just use one of the 'contra pills' (the pack contains several) to go back to your old body. After giving one more look to your penis, you pop the pill into your mouth and swallow.
It takes a few seconds for the pill to take effect, but once it gets into your system, it starts subtly rearranging your body like crazy. The balance of hormones in you alters from mostly masculine to mostly feminine, and your proportions slowly alter- your arms and legs turn smaller, your hands and feet more petite, your skin less hairy and smoother, your facial features softer, your voice higher, your shoulders narrower, your hips wider. Getting to see and feel everything shift around is so surreal and intense.
The intensity ramps up further still as the pill's effect emerges in your chest and crotch. Your nipples grow sensitive and hard, and you gasp in your newly feminine voice as you rub them. You feel flesh swell and grow under them, and cup your newformed breasts as they develop before your eyes.
Further down, you notice your manhood slowly receding. Your penis is getting sucked back inside you and the nerves seem to be gathering around the tip, while your testicles are pulled into your body and reshaped into ovaries as your reproductive system rapidly shifts from male to female. Soon the changes outside finalize, as your shaft retracts and the tip turns into a little nub that you realize is your clitoris, while your scrotum tugs inward until it's almost flush with your crotch, when a warmth inside you seems to reach down and prise it open, giving you a vagina.
For a moment after your change finishes, you stare at yourself in amazement. You really just turned into a woman! You check your ID and see that it's your girl self- you're still called Aidan, but you were and are a girl instead of a boy. It's like you're your own twin or clone or something.
You wonder what to do with yourself now...