Time to explore this frightening body.

"I need to take a look! ...j-just to confirm."

I immediately start fiddling with the buttons at the top of Serena's uniform. But I'm still clumsy with my new tiny hands, still too anxious and agitated. And overall, my shaky fingers don't seem capable of performing a task as simple as unbuttoning a shirt. Not at this moment at least, not before I manage to slow down my thumping heart a tiny bit.

I clench my borrowed hands, choosing to stop my fruitless endeavor for a moment before I end up ripping apart those buttons out of pure frustration.

"Pohhh...... haahhhh..." I breathe deep, eyes closed. "...poohhhh........... haahhhhhhh..."

I do it a few more times, filling my new lungs to full capacity, feeling each time the increasing pressure over the protruding lumps on my chest while those same lumps push forward the straps I have on my armpits and back.

I manage to relax a little bit somehow, enough to look down at my(Serena's) ample chest without biting my lip.
A woman's body. This is what this is. This is what I've become. How? I don't fucking know, but I surely as hell won't miss this opportunity.

"Calm down... calm down..." The cutest voice in the world is coming straight from my very own mouth, hindering my efforts of calming down even further. "Please..."

It takes me a while. But eventually, I manage to open a few buttons with my new hands, and I'm immediately gifted with the sight of the great valley in the shadows, two hills of plump sweaty skin curving to the inside, pale and glorious. I need to see more, I need to feel more.
I'm panting now, opening more buttons, until my hands disappear under the curve of this body's massive chest. I'm now using only the sense of touch to guide my restless hands, but somehow I still manage to get the job done.

"Aahh..." I gasp like a child. I have a bra! A huge bra! I've got a pair of giant boobs and I'm wearing a bra!

Or rather, Serena is wearing a bra. But I am Serena now, right? ...or am I? Did I turn into Serena somehow? Or did I actually possess her body? Is she still here somewhere? Uuggghhh, again, I don't know! So stop it! Stop thinking about it! I'll have time for that later...

Once my nurse uniform falls down to the floor, revealing almost entirely the glorious body I now possess, I look at the mirror and can't help but snort. It's not here! I see some cute white panties and a pair of well toned legs, but between them there is nothing but a void triangle topped by a flat surface.

"Ough, maaan..." I close my teeth in a shaky smile while touching that place. There is... really nothing. No bulk, no shape to feel or to be felt, only warmth and softness, a mere extension of my belly with a slightly scratchy feeling that feels like... hair? And under that hair...

I press down with two fingers, only a little, following the contours of the soft fabric until, right in the middle, I stumble upon a very little protrusion. Curious and not very thoughtful, I bend my fingers and press over that protrusion.

And I feel a jolt, from my crotch to my head, so sudden and unexpectedly intense that my subsequent gasp almost turns into a moan.

What was that?! I think for a moment, but my thoughts get immediately distracted by yet another new feeling.
The warmth is extending upwards. I feel it in my chest! I'm feeling it in my breasts!

"M-My nipples..." My feminine voice sounds different from before, getting weaker and gaspier. Is this how an aroused woman sounds like to herself?

I laugh once again, feeling like a tourist in the weirdest, greatest attraction of his life.

My thin hands go back to stroking Serena's massive boobs, pressing up under the cups of the bra, enjoying the touch and especially the weight. Holy crap, they are so heavy I can clearly feel the load shifting through the straps of the bra every time I raise one of them.

As a woman who has to deal with these deadweights 24/7, they must be incredibly cumbersome.
But as an heterosexual man who has never properly touched a woman before, I welcome every single extra gram. There things are straight up breathtaking.

I want to see them! Right now!

Like a person possessed(pun intended), I start fiddling with the clasp of the bra. It takes me an embarrassingly long time to figure it out, but eventually I manage to open it. And once I throw that annoying garment away, I'm finally gifted with the vision of Serena's breasts in all their glory.

"H-Holy shit!" I exclaim, way too agitated for my own good.

They are huge! A-And I can clearly feel the colder air of the room through them! It's unbelievable, how these abnormally large lumps of flesh are really a part of me. They are so pale and round and... pretty... And it's amazing how they keep their shape so well despite not wearing the bra knowing how much they weight!
Are they natural though? How do I know that? How do I... Aghh, fuck it, let's just give them a nice squeeze.

I literally sink Serena's thin hands into the engorged flesh of her breasts. It's incredibly soft and at the same time it has a kind of... springy feeling. Like touching a pair of gigantic marshmallows.

"Ah-haahhh..." I whimper with genuine glee.
Am I actually in Heaven right now? Did I die for real and end up meeting the goal of every religious soul in existence? That would be strange, and certainly ironic for a non-believer like me.

I keep playing with my boobs for a very long while, until they become almost as warm as my crotch, until those pleasant tickles from before turn into prolongued waves of pure satisfaction.

I love these breasts, I seriously do, and I feel like I could keep on with this action for hours to come.
However, I'm getting a very distinct itch somewhere else. There is a particular place in this new body of mine that requires attention. I cross my legs by reflex, rubbing Serena's soft thighs on each other, but that does nothing to calm that itch. So with her boobs still in my hands, I look down with surprise on my face. Only now I'm starting to notice the wetness. This place between my legs feels moist, and rather uncomfortable.

"I'm... wet." I mutter in realization.