Onpu and the Symbiote by Imouto Kitten

The Ojamajo are flying over a forest in the Majokai, having just 
completed Hana's latest health exam. Among the quartet, a certain 
purple-haired apprentice was flying slower than usual. Onpu had needed 
to pee for quite a while, and the stern Majoheart, the Doctor in charge 
of the health exams, was not the kind of woman one was willing to ask 
where the bathroom was. It was becoming apparent to the purple 
apprentice that she wouldn't make it back to the MAHO-Dou, much less her 
home with dry panties if she didn't make a pitstop, and while squating 
in the woods repulsed the child idol, the thought of having an accident, 
especially where the other girls could see, repulsed her more.

Doing her best to maintain composure, Onpu shouts to the Ojamajo flying 
in front of her, "The rest of you go ahead, there's something I need to 
take care of." Before the others have a chance to ask her what she needs 
to take care of, the purple-haired girl zips off towards the forest 
below.

Finding a spot with little undergrowth and enough canopy she can't be 
seen from the air, Onpu lands and discards her broom. Throwing all 
attempts to remain lady-like to the wind, she reaches under the petal 
skirt of her apprentice uniform, yanks her panties down to her knees, 
and squats over the bare ground just as her dam breaks, a powerful 
torrent of hot pee jetting from between her legs to puddle on the ground 
beneath her.

Letting the relief of releasing her pent up urine wash over her, Onpu 
closes her eyes and lets out a sigh of contentment as she tunes out 
everything around her except for the pitter patter of her pee against 
the soil. After more than a minute, her stream finally slows to a 
trickle before stopping completely.

She starts to wonder how she's going to dry herself, but such thoughts 
are driven from her mind when she opens her eyes to see a strange 
creature lapping at her frothy puddle. The creature has the general body 
shape of a scorpion, but instead of the armored exoskeleton or shell of 
an arthopod, it appears to be covered in pale skin that is scaley like a 
reptile, the fore limbs are tipped with suction cups rather than 
pincers, and instead of a venomous stinger, it's tail bares an 
unsettling resemblance to a penis.

Seeing the creature, Onpu screams and crab walks backwards until she 
bumps into a tree. Before the purple-haired girl can make another escape 
attempt, the creature charges her with speed that a cheetah would be 
jealous of.  Before she can react, the creature has climbed up under her 
uniform, latched it's suction cups on to the nipples of her budding 
breasts, and sunk the needle sharp tips of it's remaining legs into her 
flesh.

Onpu's panic and fear subside as the creature uses one of it's 
needle-like feet to inject a calming hormone to counteract the 
purple-haired girl's adrenaline. With it's new host sedated, it flexes 
its tail to position the tip at her virgin opening and before Onpu can 
gather her thoughts enough to realize what the creature is doing, it 
plunges its tail deep into her pussy, the tip piercing her maidenhead 
and coming to rest against her cervix.

Thanks to secretions from the creature that deaden pain and boost 
pleasure, the scream that escapes Onpu's throat at suddenly having her 
virginity stolen from her is one of pleasure rather than pain. With its 
host making no effort to continue struggling, the creature withdraws 
it's tail until only the tip is still within her before plunging it in 
once again.

As the creature starts to fuck the child idol in earnest, Onpu starts to 
moan in pleasure, the knowledge that she's being raped by something 
found nowhere in the human world lost within her ecstasy. She even 
starts to gently stroke the creature through her clothes, whispering 
encouragements such as "That feels good!" "Fuck me harder!", and "YES! 
That's the spot!".

Before long, the pair reach a shared climax, Onpu's pussy clamping down 
on the creature's tail as something spews from the tip of its tail to 
fill the witch apprentice's womb. Compared to human semen, the 
creature's ejaculate is much cooler and far thicker. Exhausted from the 
ordeal, Onpu wraps her arms around the creature before falling asleep, 
her back against a tree,, her panties still around her knees, and the 
creature still attached to her, it's tail buried in her pussy, it's 
foremost limbs sucking on her breasts, and it's other limbs injecting 
various substances into the sleeping girl.

###

When the other Ojamajo find Onpu, she's still unconscious with her 
panties down and the rest of her clothes askew enough for them to see 
the creature's tailed buried within her. Not knowing what the creature 
is or if it's safe to approach, the girls use magic to levitate the 
unconscious girl and return to Majoheart's clinic to ask the stern witch 
elder for help.

###

"She's fine, but there's nothing I can do about removing the symbiote." 
Says the frowning witch doctor as she looks over her patient, the 
purple-haired girl now laying naked on an exam table, the pale skin of 
the creature laying on her abdomen nearly matching the unconscious 
girl's. Continueing, Majoheart explains, "These symbiotes are all male 
and require a female host of another species in order to reproduce. 
They're generally harmless, pleasuring cooperative hosts sexually and 
giving them regular doses of pleasure hormones and all they really ask 
for in return is that their host's womb serve as an incubator for a 
larva, that the host produces milk to nourish the symbiote, and that the 
host defends the symbiote from attack. They are rather nasty in that the 
initial implantation is usually rape by human standards and they are 
nearly impossible to remove without seriously injuring the host. If it 
felt threatened, it would give her a dose of something that would have 
her awake and ready for fight or flight almost immediately, and even if 
we succeeded in sneaking up on it, those needle-like legs tend to leave 
nasty wounds if ripped out and it would never give us the time needed to 
remove them surgically."

Hazuki asks, "So, is Onpu-chan stuck with that thing forever?"

Majoheart replies, "They tend to detach of their own accord when the 
larva is ready to be born, but they'll usually employ their current host 
in finding a new host and the newborn usually attaches to the one that 
served as its mother and repeats the process. However, they do tend to 
prefer juvenile hosts and many times, the sexual maturity of a host will 
cause the newborns to seek out a new host instead of attaching to their 
mothers.. I'm afraid the best I can offer is wait until Onpu finishes 
puberty, the last symbiote she birthes decides she's no longer a 
suitable host, and hopes the withdrawal from the symbiote's secretions 
isn't too terrible."

###

Once Onpu had awoken, the Ojamajo shared with the purple-haired girl 
what Majoheart had told them, with Onpu seeming rather glad at the 
prospect of carrying around the symbiote for the month until the larva 
in her womb would be ready to be born.

###

Despite playing host to a creature not native to the human world, life 
continued fairly normally for the purple-haired idol, or at least as 
normal as life gets for a child idol who is secretly a witch apprentice 
and one of the foster mothers of a witch infant. The symbiote didn't 
protrude very far from Onpu's skin, making it easy to conceal under even 
form fitting clothing, and it normally spent the day sleeping while Onpu 
went about her routine of school, idol work, and work at the MAHO-Dou. 
The most noticeable difference to those who didn't know about magic is 
that Onpu's appetite had increased due to the girl needing to nourish 
not only herself, but the symbiote living on her abdomen and the larva 
living in her womb, not that anyone other than the Ojamajo would've ever 
suspected such. The most noticeable change for the idol herself was that 
her passenger would, every night when Onpu was ready for bed, use it's 
tail penis to give the idol several orgasms, something that Onpu came to 
anticipate.

###

Onpu was on cleaning duty with Doremi when her passenger injected her 
with the chemicals to induce her to locate a suitable host it could 
transfer to so their child could nurse from it's mother. With Doremi as 
the only young female in the vicinity, the child idol was soon pinning 
the redhead to the chalkboard, their lips meeting and Onpu's hand going 
down the front of Doremi's shorts.

Having forgotten about the symbiote on account of how unintrusive it had 
been in Onpu's life and the general shock of being kissed and fingered 
by one of her closest friends, Doremi makes no attempt to escape at 
first.

Breaking the kiss, Onpu declares, "My passenger thinks you'd make an 
excellent mother for baring my first child's brother."  before yanking 
the redhead's shorts and panties to her knees.

Starting to panic, Doremi asks, "What are you talking..." but is cut off 
as Onpu drops her own shorts to reveal her passenger's tail penis, free 
of Onpu's cunny for the first time since attaching to the idol. 
Realization dawning on her, Doremi tries to flee the room, but Onpu, 
fuelled by adrenaline provided by her passenger, manages to trip up the 
odango-headed girl and pin the redhead to the floor.

Straddling Doremi's waist and gripping the redhead's wrists as the older 
girl thrashes, Onpu says calmly, "Calm down, Doremi-chan. He's quite a 
skilled lover and I'm sure you'll just love the way he'll make you 
feel!" Unable to break Onpu's grip, Doremi watches helplessly as the 
symbiote crawls down from under Onpu's shirt and crawls up the 
redhead's. Doremi can feel the symbiote latching onto her nipples and 
her terror starts to receed as it's needle-like feet pierce her flesh.

Before Onpu can witness her former passenger taking her friend's 
virginity, she feels her own womb contract, the first sign that the 
larva within her is ready to be born. As the elder symbiote begins to 
give Doremi the pleasure that will make her servile to the symbiote and 
it's descendants, the younger symbiote within Onpu starts to force the 
child idol's cervix open. Thanks to how the elder symbiote's regular 
injections have altered the tissues of her reproductive tract, instead 
of the agony of normal human child birth, Onpu experiences intense 
pleasure as her child slithers it's way down her birth canal.

As soon as it's head and suckers emerge from her pussy, the younger 
symbiote starts to climb it's way up Onpu's body to nurse at her still 
small breasts and sink its pointed, but not yet sharp, feet into the 
punctures left by it's father. The birth concludes when only the tail of 
the newborn is still within it's mother, at which point it proceeds to 
fuck the pussy it just emerged from, fully intent to reimpregnate its 
own mother even as its father is busy impregnating its mother's friend.

###

When it's time for Doremi to give birth for the first time and Onpu the 
second, the purple and pink apprentices easily subdue the orange and 
blue apprentices. Hazuki was the first to go down, and while Aiko put up 
a fight, she was still outmatched by Onpu and Doremi working in tandem 
and enhanced by the drugs the symbiotes injected. Next, the other girls 
in Grade 4 at Misora First Elementary became hosts to the symbiotes and 
they soon spread to the other years, though many of the sixth graders 
had been determined to be too old to be suitable hosts for the 
symbiotes. By the time Yuki-sensei discovered the extent of the 
infestation, it was too late for the incognito Witch Queen to prevent 
every girl in the school from becoming a host for the creatures.

When Poppu graduated from Sonatine Kindergarten, she an the other new 
first graders were initiated by Doremi and the other now fifth graders, 
Doremi herself passing on a symbiote to her sister while Reika welcomed 
her cousin Erika into the fold. When Momoko transferred, the symbiotes 
hosted by Hazuki, Aiko, and Onpu fought among themselves for the honor 
of impregnating the blonde apprentice.

With the entire school, or at least the female half, either hosting a 
symbiote or deemed unsuitable as a host, the oldest symbiotes started 
becoming unbonded when their hosts gave birth, some escaping into the 
wild in the human world, but most being gathered and returned to the 
wilds of the Witch world, but it was obvious that getting rid of them in 
the human world would be nearly impossible by any reasonable means.