You hastily get up, lock the door to your room, and pull off your PJs and underwear, laying back on your bed naked. I'm really gonna do this, you think to yourself. I'm gonna turn into a girl. You wonder for a second how to transform, but you don't have to do anything consciously- your body is starting to respond to instinct.
It's hard to describe how it feels- the best comparison you can think of is it's kind of like arousal, with how your hormones prepare your body to have sex. But the feeling is really different, because the hormones are preparing your body to CHANGE sex. Instead of desire getting reflected outwards to imagined or real people you want to fuck, it's getting reflected inwards to a version of you you want to be.
Feminine hormones are surging through you, seizing every masculine part of your body and reshaping it. You stand yourself up on quivering legs and stand in front of your closet mirror, holding yourself up with your hands and gasping and whimpering as you see yourself metamorphosing.
A tingling ripples across your skin as most of your body hair vanishes and it turns smoother and more supple to the touch. Your hair cascades down past your neck and partway down your back, and you feel another shiver run through your face as your features resculpt. It's so surreal to see your face with softer cheeks and puffier lips- you still look like you, but female instead of male. Your gasps and pants heighten in pitch as your neck narrows and the bulge of your larynx shrinks away.
You feel a sort of convulsion in your body as your proportions turn more feminine. Your shoulders narrow and your hips widen, and everything seems to turn more petite. Before you know it, you're a few inches shorter, you're thinner everywhere but your hips and butt and your arms and legs and hands and feet are more small and lithe.
By now the only places your body still looks male are your flat chest and your penis. Having left their mark on everywhere else on your body, the hormones spread to these traits of maleness and start to make them female. Your nipples prick up, swelling and getting erect. Feminine arousal races through your mind, fantasies of having them rubbed and pinched and licked and sucked coming to the surface. Your hands move to them and you gasp with pleasure as you discover your emerging erogenous zone, soft mounds of flesh forming under your touch until you have distinct breasts.
A twinge in your crotch makes you look down and notice your penis feels hard, but isn't erect. You whimper as it starts to shrink into your body, but realize this is natural- very soon, you aren't going to be male anymore. The hormones seize your testicles and castrate you as they suck them up into your body with two wet pops, remolding them into your ovaries and attaching them to a womb inside you. Your scrotum flattens and the seam along its base unseals to form a vaginal slit, and your penis soon recedes into a clitoral nub atop its folds.
Before you know it, your transformation has finished- you're a woman. You stare at yourself in amazement at how simple the change was and how surreal it is to see yourself as female and feel female now, loudly panting and gasping from the intense, indescribable sensations.