Suddenly a chocolate mouse

You're browsing a thought-provoking thread on 4chan when there's a flash of light on your desk.  You stare, a bit dumbfounded at the brown paper bag that appeared next to your keyboard.  Suddenly the bag jumps and tips over as a curvy brown-furred mouse girl tumbles out.

“Oh my god, it actually worked!” she cries out, her voice giddy with excitement as she runs her paws over her body.

You remain speechless as the new mouse-girl (you assume her body is new, judging by the thread you'd been just reading) feels herself up.  You casually reach into the bag and see a pamphlet and some kind of little black box.

“So are you my master?” she asks eagerly, leaning onto your computer mouse and striking a pose.

“I guess... Though I'm still wondering if I'm having some sort of bad trip, or a really convincing dream.”  You tell her as you open up the pamphlet.

“Oh this feels way too real to be a dream.” She says, rubbing her breasts with a lewd smile on her face.  “Look how firm they are!”

You chuckle as you read through the document.  “This is ridiculous” you say, then add when you see her look at you, “Congratulations on purchasing your new Micro Mouse living-toy/sex-pet, a RodenTech product.  It says here you have a lot of... functions.”

You reach into the bag and pull out what turns out to be a remote control.  “I guess that's what this is for.”  You point it at her and push a button.  She gasps and looks at her hands as her fur turns a creamy white.

“Neat.” you say as you keep reading.  “Oh wow, some of these are...  Deep Penetration mode.  Little Latex mode.  Chocolate Mouse mode.”

Another button is pushed and the mouse moans as her body shifts again, the changes much more substantial this time.  Her body once again taking it's original brown coloration, but all of her fur recedes into her skin, leaving a smooth chocolate surface behind.

“Oh wow, I can taste myself on my tongue.” she says in awe, running one of her fingers into her mouth.  You can see she's rubbing her thighs together.  She's clearly into this sort of stuff.  You smile and bring your finger down to her level.  She smiles and groans as you rub your finger against her front, from her hips up between her plump breasts.  Her tail wraps around your finger as she starts grinding up against you.

“This is too much, I'm gonna pass out if you keep it up!” she says with a squeak.

“Hold on, I want to make one more adjustment.” You tell her, tapping the remote once more.   She cries out in surprise as she shrinks and becomes even smaller.  She's almost as tall as your thumb now.  “Mmmm, nice and bite sized.”

“Wait, what are you... ?”  She tries to ask but you've already picked her up and brought her up to your face.

“Don't worry, trust me.  I just want a taste...”  You slowly run your tongue against her.  You're not sure if the taste of melted chocolate is from her body, or if it's from her having just orgasmed.  Either way, you feel you've done enough foreplay.  You bring her up to your mouth and slide her in.   She kicks weakly as you play with her on your tongue.  Judging by the way she's spasming, she's probably orgasmed a few more times.  You feel her thighs grip your tongue.  You tisk and swallow, pushing her deeper into your throat.  She cries out as she's soon tumbling down into your stomach.  You pause for a bit, marveling at how tasty her chocolate taste actually was, then go back to the pamphlet to see what's involved in recovery.

You let her enjoy lying in your stomach for a while, then activate another command on the controller.  With a small flash, the mouse girl is back in her the first form you saw her in, brown and furry, lying on your desk in a daze.  Her fur has a disheveled look, and you can tell from the look in her eyes that she's still reeling from a pleasure high.

- - -

“So, you want to try out some of the other functions?”

“What else is there!” the mouse asks excitedly, still tired but very excited to try some more.

“Not sure, I don't even know what some of these terms mean.” you tell her, seeing a deluge of options on the remote's small screen.

“Here, bring the remote down to the desk so I can see.”

You do as she's asked, a little amused at the idea of a pet-slave manipulating her own control.  You briefly wonder if she could she give herself the form of a dragon and escape?  But you dismiss the thought.  This is all for fun, and even though you just met mouse-anon, you trust her.

“Oh my...” she says, her ears perking up.  “Though, I suppose it makes sense.  We would need something like that if you want to penetrate me without hurting me.”  She looks up to me with a grin, pointing at her selection.  “Do you know what an onahole is?”

You ponder the name for a bit.  “That's some kind of Japanese sex thing, isn't it?”

She's bouncing on her little paws once more, giggling, “Oh activate it!  You haven't cum yet right?  So we don't need to wait, let's start right now!”

You push the button and see her twitching.  You imagine it's from pleasure as she moams and grips her firm breasts as the change sweeps over her.  Like when her skin became chocolate you see a wave of color spreading across her.  She's turning into a pale blue color.  But more than that, she's becoming... translucent?   It starts at her extremities and spreads inwards.

The rate of her panting increases, and as the blue reaches her sex she starts quivering.  “That thing does not disappoint.  As weird as this feels, it's amazing...”

You carefully pick her up while she writhes a bit under what must be a few multiple orgasms, and hold her up to the light.  You can see the palm of your hand through her squishy, rubbery-gel body.  As the change finishes, you realize you can just make out a sort of channel leading from her sex up to her mouth.  And then it hits you.

“Oh... it's like a... cocksleeve.”

She nods slowly and tries to strike a pose, but her form has become somewhat stiff and her movements are more difficult than before.  “A perfect little sex-toy for master to play with.”

You head over to your couch and take a seat, a bit overwhelmed.  Seeing the look on your face she tilts her head.  “Too much?”

“No, it's just moving a little fast for me.” you tell her.  One of your hands holds her gently while the other rubs little circles on her belly, petting her subconsciously.  “I don't want to risk breaking my new favorite toy.”

She giggles at that, “Don't worry silly, this body is designed to take it.”

She hops out of your hand and lands in your lap, leaning against the very notable tent in your pants.  “It sure looks like little-anon here wants in on the action.”  She's already ready for more.  You wonder if her transformation changed her libido, or if she was just as insatiable as a human.   “Think about it... You're going to cum in me so deep I'll be able to taste it, literally.”

Weird or not, it's hard to deny that the very thought has your erection throbbing.  You pick her up again and use a finger to tease the lips of her sex.  They feel firm, but they're also stretchy and take in your finger without much trouble.  She's surprisingly smooth.  “Should I use lube?”

She nods, “Just make sure it's water-based.  Oil-based might mess with my rubber.”