I combined the following prompts in the Macro thread

Go to a convention
Meet some guy in a fursuit also wearing one of those shady merchant costumes
He tries to sell you some kind of "potion"
Says its just some homemade drink he makes and that you can keep the bottle
Eh, you were thirsty, its cheap enough and the bottle looks nice
Pass out immediately after drinking it
Wake up sometime later
You seem to still be at the convention?
You look around and notice you've been shrunk, and are in some kind of bottle
The same potion bottle the merchant sold you
Speaking of which, he's still close
Sitting at his own merch booth
A booth which you are on now
You look around the convention
Everyone here has fursuits now
There were a few before but now you can't see anyone not in one
It takes a bit before the realization hits you
Those aren't fursuits
You look around at the booth closet to yours
They all have one thing in common
They're all themed around humans
You have been shrunk and are for sale at the human themed section of a fantasy con for anthro's

and

big titty macro goth gf....

for this

be anon
stuck in jar on convention booth table
some anthros express passing interest but move on quickly enough
except this bunny girl
all black fur
black leather clothes and lace
red eyes staring at you intently
says something quietly to the table guy
about 2 seconds after the cash is out of her hand your bottle is snatched up
shes practically jogging with you to the bathroom
shes fiddling with the jar and something metal is being wrapped around its neck
eventually the movement stops and you're able to stand and look around
the bottle is half buried in some fur
turn around to see the bathroom mirror
goth bunny girl with huge titties has you shoved in her cleavage
a silver chain around her neck is keeping your prison in place
she smiles briefly and heads back out to the con floor
just about every male that walks by catches a glance at you
their looks of envy don't exactly make the wild ride any more comfortable
or the growing heat
hours go by before she heads out of the con
direct sunlight seems like it's going to be a problem
never mind, she shoves you even further into her cleavage
thin rays of light coming down through the fur
you can think you can hear her getting in a car maybe some talking
hard to hear over her heart beating like a drum
her body heat is starting to make this uncomfortable
more movement
then bouncing, shes either going up stairs or deliberately trying to knock your fillings out
a door shuts and you are fished out of the fur
those big red eyes are inspecting you very closely now
a knock on the door "honey, come down to dinner, you spent all day at your little convention..."
she interrupts "I'm coming mom, just putting my stuff down"
her eyes don't glance away from you
hard to forget you qualify as her stuff in this scenario
she puts you on top of a dresser and throws some bags on her bed
shes about to head out the door but stops and glances back at you
she leans down and says "no escaping" before getting out some electrical tape
a few chaotic spins and the cap of your prison is more secured
she leaves you back on the dresser, though you're significantly dizzier
minutes tick by and you look around
her decorating leaves little to the imagination
black is definitely her favorite color
black sheets, black clothes on the floor, black journal on the bed, black candles on the dresser
she even has black wallpaper with a kind of rose print on it
it makes some of the photos on the wall stand out though
a very suburban looking rabbit family
though they all have white fur
but the oldest daughter in the photo definitely has those red eyes
and the almost comically large chest on her small frame
so she even dyed her fur black
you try not to think about what an edgy teenage girl might want with a shrunken human as you wait
dinner must be a proper affair in this household because the sun has set by the time she gets back
she doesn't even turn on the lights
instead she goes around setting up and lighting a truly ominous number of candles
her bed is cleared off save for the journal and she gets you from the dresser
sitting cross legged on her bed she takes the cap off your jar
you're roughly shaken out into her open paw
she grasps you more gently than you were prepared for but you don't struggle to keep from getting dropped
"good boy, you're safe" she says
grasping you slightly more firmly she opens the journal
a lot of detailed crosses and symbols intermixed with very girly gel pen writing
she gets to the last page
a big ole pentagram with a tiny stick figure human in the center
"I'm going to make you my familiar"
oh geez
she gets a safety pin from her bedside table, pops it open, and sticks the tip in a candle flame for a few seconds
you do not like where this is headed and her grip tightens slightly as you struggle
she makes some shushing noises as she brings back the pin
there's a moments pause as she considers that both her hands are full
she slowly sets you down in front of the journal
you finally get a good look at the giant black rabbit girl in candlelight
the sheer strangeness of today seems to be making it impossible for you to consider what to do
her hand hovers over you, maybe shes anticipating you're going to run
as if you could get anywhere quickly on this poofy comforter
once she seems confident you're not going anywhere she slowly pulls her hand back
biting her lower lip she pricks her thumb with the pin
then she presses it on the tiny human drawing in her journal
still too weirded out by this whole thing, you don't really react as she moves her thumb to your face
a small amount of blood paints your forehead and she brings the thumb up to her mouth
sucking on the tiny wound she muses "what to name you?" to herself
touching the blood on your head and looking at it on your hand you say "uh, my name's Anon"
you glance up to see her completely frozen
"Get the fuck out" she whispers
"It really worked, my familiar can freaking talk?"
oh shit do humans not normally talk here?
"uh, yes?" you say, unsure of how much you should commit to the bit
"what's your name..." you begin to ask before getting snatched up
she's just muttering 'holy shit' to herself and kind of freaking out a little as she holds you close to her face
"you can really talk..." she says "uh, call me master, er, uh Mistress"
she straightens up and with a little more confidence says "I am your Mistress and you, Amon, are my familiar"
close enough, you're not going to argue details with "Mistress" for the time being
"What exactly does a familiar do?" you ask
she blinks, and its obvious she didn't intend the game to get this far
after a brief pause she says "You will do whatever your mistress commands"
a wide grin crosses her face and before you know what's happening she buries you into her cleavage in a hug
she rolls back onto the bed and kicks her feet up
"I'm a real witch with a real familiar!" she says excitedly and laughs
a knock on the door and the voice from earlier says "Dear are you alright in there?"
she sits back up "Yeah mom, I was just uh, reading something funny"
"okay, get to bed we have church in the morning you know"
"I know mom, goodnight"
she rolls over and pulls you out onto the pillow next to her face
she's petting you gently and it's actually pretty nice, if insanely weird
"you're really real" she says
having no response you lie there for a little while, after today it's a struggle to stay awake in the low light
she gets up and starts putting out candles and moving stuff around
she undresses without much awareness that you're still watching
she puts on a black t-shirt and crawls back into bed
"I want you to sleep right here next to me" she says handing you a black handkerchief as a blanket
"okay" you say tucking yourself in
maybe this is a weird dream and you'll wake up at home
but something about those red eyes staring at you as you drift off to sleep make you think you're here to stay

End