A Girl and Her Guardian Beast by Imouto Kitten

Keroberos, Guardian Beast of the Seal of the Clow, well Seal of The 
Sakura now that a new master had been chosen and all the cards had been 
transformed, was frustrated. Instead of the usual frustrations of being 
denied sweets, losing at a challenging video game, putting up with that 
Li Brat, or having to pretend he's a stuffed animal, Kero's frustrations 
were sexual. Despite being a magical construct created by Clow reed and 
thus the only member of his species in existence, he was still 
blessed/cursed with the equipment for reproduction and the desire to use 
said equipment, and his hormones and instincts were presently screaming 
'it's mating season!'. The closest thing to another of his kind he could 
take as a mate was Spinel Sun, but Kero didn't swing that way and prayed 
Eriol hadn't made the black panther attracted to the golden lion.

And so, there Kero was, laying on Sakura's bed in his stuffed 
animal-like form, desperately trying to relieve his throbbing erection 
with his stubby paws. His penis wouldn't be anything worth commenting on 
it's own, but while small in overall size, it was huge in proportion to 
the guardian beast's small body, being about the same length and 
thickness as a roll of lifesavers. Kero knew he could more effectively 
pleasure himself by performing autofellatio in his true form, but 
Sakura's bedroom wasn't really roomy enough to let him stretch out 
properly in that form and he didn't like the idea of Sakura's brother or 
father catching him in the act, even if the Kinamoto men were now 
officially in the know about his true nature and Sakura's status as 
Mistress of the Cards.

Kero was so focused on his task that he didn't notice Sakura entering 
the room in her school uniform and socked feet. Dropping her bag in 
shock at the sight before her, Sakura yells, "KERO! What are you 
doing!?"

Snapping out of his concentration, but with his front paws still on his 
member, Kero looks up to make eye contact with his mistress and best 
friend, "Hey, Sakura! " realizing the compromising position he's been 
caught in, he adds, "Umm... I can explain..."

Sakura replies, "I sure hope so!"

After Kero is done explaining himself, an explanation that required the 
guardian beast to give her a shortened version of 'The Talk', a blushing 
Sakura asks, "So, it's very uncomfortable if you ignore your body's urges 
during your mating season?"

A blushing Kero replies, "It's sometimes downright painful, and to make 
matters worse, I can't even effectively relieve myself in this body and 
my true form is too big for such a small house without risking your dad 
or brother catching me and wanting to skin me alive for doing something 
so perverted where you could see it."

Giggling, Sakura replies, "Yeah, they can be a bit overprotective, 
especially Toya." Gazing at the still erect member between Kero's hind 
legs, she asks, "Is there anything I could do to help?"

Kero is taken aback by the offer. On the one hand, he feels a bit guilty 
at the thought of taking advantage of Sakura's trusting nature. On the 
other hand, the thought of being pleasured by a female is enough to 
overwhelm his imagination. In the end, he decides he'll go slow and stop 
if she puts up any kind of objection.

Nervously, he says, "Well... you could try taking me in your mouth and 
licking me like you would a lollipop..." Much to Kero's surprise, Sakura 
doesn't hesitate in the slightest as she embraces him in her hands and 
engulfs his member. The warm wetness of Sakura's mouth alone is enough 
to leave the guardian beast speechless with a blissful expression on his 
plushie face, but the sensations as Sakura starts sliding her tongue up 
and down his shaft leaves the stuffed animal look-alike moaning loud 
enough that Sakura hopes neither her brother or father come home early 
as Kero's tail thrashes in pleasure.

Within a minute of the Cardcaptor starting her ministrations, Kero is 
shouting, "Sa-Sakura! I'm gonna cum!", but his warning comes too late as 
he's already flooding her mouth with his seed by the time he says her 
name, his tail becoming straight as a pole, and Sakura reflexively 
swallowing his cum.

When Kero has finished cumming and Sakura has licked his now limp member 
clean, she pulls her head away from him as he lies limply in her hands.

Smiling, Sakura declares, "Looks like you really enjoyed that, 
Kero-chan!"

Panting heavily, Kero replies, "That... was... incredible!" Catching his 
breath, he adds, "Sorry I didn't warn you in time that I was about to 
cum..."

Brushing off his concerns, she replies, "That's okay, it was a bit 
salty, but you actually taste pretty good. Besides, it would've been a 
mess had you came on my school uniform or my sheets instead of me 
swallowing it."

Deciding to press his luck, Kero asks, "Would you like me to return the 
favor?"

Confused, Sakura replies, "Huh? But I don't have a penis."

Emboldened by her reply, Kero states, "Boys aren't the only ones who can 
enjoy being licked down there."

Curiosity piqued and remembering how much Kero seemed to like it when 
she sucked on his penis, she asks, "Huh, really?"

Nodding vigorously, Kero answers, "Yeah, just lay on your bed and remove 
your underwear and I'll show you."

Blushing, she asks, "Do I have to? Remove my underwear that is?"

Kero replies, "I can't lick you down there if your underwear are in the 
way."

Nervously, she replies, "I guess you're right..." before sitting on the 
edge of her bed, and reaching under her skirt to pull off her panties. 
Once naked under her skirt, she lays down, resting her head on her 
pillow, her legs straight, and her hands fidgeting over her chest.

Flying over her crotch, Kero comments, "You need to spread your legs." 
As she parts her thighs by a few inches, blushing all the while, Kero 
retorts, "You need to spread them more than that!" Blushing more deeply 
and putting her hands over her face, Sakura spreads her legs wide, 
giving Kero plenty of room to access her most precious place.

With her face still covered, Kero lands between Sakura's legs and gives 
Sakura's girlhood a sniff before reaching out his cat-like tongue and 
licking her outer folds.

With her voice muffled by her hands, the cardcaptor says, "This is so 
embarrassing!"

Smiling widely, Kero replies, "Don't worry, Sakura, soon you'll be 
feeling too good to feel embarrassed!" Before parting her folds with his 
front paws, burying his nose in the girl's girlhood and going to town 
with his tongue. Soon enough, Sakura's hands are clenched into fists in 
front of her chest and the cardcaptor is moaning loudly under Kero's 
ministrations.

Inbetween moans of pleasure, Sakura manages to say, "Ke-Kero-chan...  
that.... feels... so... good!"

Muffled by her crotch, Kero says, "And I haven't even touched your clit 
yet!" Though Sakura didn't hear and thus had no warning as the plush toy 
like creature places a paw on her clitoris and squeezes, the sudden 
surge in sensation triggering the young girl's very first orgasm, her 
body going into seizures as she not only drenches Kero's face in her 
girl juices, but suddenly looses bladder control, her golden liquid 
spraying all over the small creature.

When she recovers from her mind blowing climax and notices the mess she 
made of the bed, Sakura scolds, "Kero! Look at the mess you made me 
make!"

Waving a paw in the air, Kero says, "it's nothing Bubble couldn't fix in 
a jiffy." Noticing that he's hard again, he asks, "Want to try something 
we'll both enjoy?"

Not sure she could withstand a repeat of what just happened, but too 
curious to stop, she asks, "What did you have in mind, Kero-chan?"

Smiling, he replies, "I could try sticking my dick in your pussy."

Confused, she replies, " Your dick? In my pussy? What are you talking 
about?"

Realizing the source of her confusion, he answers, "Dick is another word 
for penis, and your pussy is that hole between your legs where I was 
licking. That's what a boy and girl do when they mate, the boy sticks 
his dick in the girl's pussy."

Nervously, she replies, "But if we mate, couldn't I get pregnant? I'm not 
ready to be a mommy!"

Reassuringly, Kero answers, "If you mated with a human boy such as that 
Li Brat..."

"Hey, Syaoran isn't a brat!" She cuts him off.

Ignoring her outburst, he repeats, "If you mated with a human, you might 
get pregnant, but it would take a lot of magic to concieve given that 
we're completely different species. So, want to give it a try?"

Laying back down, she answers, "I guess, if you're sure I can't get 
pregnant."

Doing a mid-air flip, Kero shouts, "Yahoo!" before flying down to 
Sakura's pussy and ramming his cock deep within her. Neither knew about 
hymens, but fortunately for the cardcaptor, her years of cheerleading 
practice had torn her barrier and Kero met no resistence as he sunk into 
her depths. Soon, the guardian beast was thrusting his tiny hips as fast 
as he could and the cardcaptor was moaning loudly.

Feeling his orgasm approach, and not wanting to cum too quickly, Kero 
pauses in his thrusts and comments, "Sakura, you have a really nice 
pussy, it's all I can do to hold off my orgasm."

Her voice full of lust, Sakura replies, "Your dick feels really good 
too, Kero-chan! It's much better than when you licked me!" Shifting to a 
whine, she continues, "But please, Kero-chan! I need to feel you moving 
inside me! Cum in me as many times as you like, but please, just keep 
moving inside me!"

Hearing the desperation in her voice, Kero resumes his thrusting, trying 
his best to rub his belly fur against her clit and hit her g-spot on 
every thrust, doing his damnest to bring his mistress to the release her 
body was obviously craving, her ever louder moans serving to encourage 
him further.

Before long, Sakura's body is once again trembling in orgasm, the 
cardcaptor screaming her pleasure to the heavens. Feeling his mistress's 
passage clamp down around his member is more than the plush-looking 
guardian can take, his tail becoming straight and rigid as he unloads 
another batch of semen, this time within the cardcaptor's cunny.

As they come down from their shared climax, Sakura is the first to 
speak, "That was incredible, Kero-chan! If you ever need to relieve 
yourself again, I'd be more than happy to help you out!"

Deciding to go for broke and wanting to try one more thing, Kero asks, 
"Do you think you're up for one more round?"

Sakura replies, "I'm kind of tired, but I think I could manage once more 
before taking a good rest." As Kero pulls out, she whines, "Why are you 
taking it out?"

Kero answers, "Would you mind getting on your hands and knees? I'd like 
to try a different position."

Not sure why Kero made the request, but being eager to feel the plush's 
cock inside her again, she complies before asking, "Like this?"

Excited, Kero replies, "That's perfect!" before flying up behind his 
mistress and flipping up the skirt of her uniform to expose her butt and 
girlhood. Lining up his member with her opening, he slides within her 
once again.

Once seated fully within Sakura's pussy, Kero's Wings expand to envelop 
him and he starts to glow and increase in size. As the guardian beast 
returns to his true form, his member elongates and thickens within 
Sakura's passage, ultimately becoming more than a foot long and as big 
around as the girl's thigh. While a normal 12-year-old would be torn to 
shreds if stretched to such an extent so quickly, being the most 
powerful sorceress in the world, Sakura's magic reacts instinctively to 
protect her, letting her insides stretch to accomodate Kero's unexpected 
transformation.

Though unhurt, Sakura still screams from the shock of feeling the small 
cock within her swelling to monstrous proportions within a matter of 
seconds. Craning her neck to look up at the massive winged lion that is 
Keroberos's true form, she yells, "Kero! Why didn't you warn me you were 
going to transform!? And why did you transform while inside me!?"

His voice now much deeper, Keroberos replies, "I was afraid you'd refuse 
to mate with me in my true form if I asked..."

Outraged, his mistress replies, "Of course I would have refused! Your 
dick is frickin' huge! I'm surprised you didn't rip me apart!"

Feeling abashed at Sakura's tone, especially with the uncharacteristic 
near-swear, Keroberos replies, "I'm sorry, we can stop if you want..." 
As he makes to pull out, a jolt of electricity shoots up Sakura's spine 
and her arms give out as she lets out a pleasured scream into her 
pillow. "Are you okay? Did I hurt you?" shouts keroberos, worried by her 
reaction.

She utters a reply, but is muffled by her pillow.

Still worried and too afraid of hurting Sakura to move, he asks, "What 
was that? I couldn't hear you."

Lifting her head off the pillow enough to be heard and speaking in a 
commanding voice laced with lust, she yelss, "I said, mate me you big 
furry idiot! Mate me to your heart's content!"

Needing no further encouragement, Keroberos pulls back until only the 
head of his massive cock is still within the cardcaptor before slamming 
back in, causing Sakura to once again scream into her pillow in 
pleasure. Bracing his forepaws against the wall, Keroberos starts to 
fuck the much smaller girl in earnest, his powerful thrusts causing the 
entire bed to shake with each impact of his pubic bone against Sakura's 
rear end.

Once she's had time to adjust to the force of Keroberos's thrusts, 
Sakura manages to push herself up on to her elbows and looking back she 
can see not only the rather prominent bulge the guardian beast's penis 
is forming on her tummy, even with her disheveled uniform partially 
obscuring her view, but the sack containing a pair of grapefruit sized 
orbs hanging between his legs.

In between the moans that escape her throat everytime Keroberos rams his 
cock home within her, Sakura manages to ask, "What... are... those... 
things... between... your... legs?"

Not slowing at all in his thrusts, he replies, "Those are my testicles. 
They're too small to see in my borrowed form, but that's where my body 
makes sperm, the part of semen that makes females pregnant."

"They... are... so... big!" pants the cardcaptor

Smiling best he can with his lion-like muzzle, Keroberos replies, "Well, 
I produce a lot more cum in this form, so they need to be big. Also, I 
think I'm almost there!" After a few more thrusts, Keroberos buries 
himself as deeply as possible within Sakura as a torrent of his seed 
erupts right up against her cervix. This sends her over the edge as 
well, her internal walls rippling along his length, trying to milk the 
beast for all he's worth. Her womb is quickly filled to capacity and 
then begins to stretch as the fit of his cock within her passage is too 
snug to allow it to leak out.

Even as her pussy continues to orgasm around his spewing prick, Sakura 
sits up best she can and clutches at her rapidly expanding belly as she 
yells in fear, "Kero! You need to stop cumming!" But the guardian seems 
too lost in his orgasm to hear her, and despite her vocal protests, 
Sakura's body is actually trying to push her further down onto his 
shaft.

By the time Keroberos is done cumming, Sakura looks 9 months pregnant 
from the semen trapped in her womb, and breathing a sigh of relief that 
she's not going to pop like a balloon, she collapses to the bed in 
exhaustion, the prick still buried within her the only thing holding her 
up and lets herself enjoy the rather pleasant sensation of being so full 
of her lover's cum.

Once he's come down from the high of his latest climax, Keroberos pulls 
his prick from Sakura's passage, a deluge of semen following as her 
reproductive tract is unplugged. He licks up his spilled seed from her 
legs, thighs, and pussy, even licking her as deeply as her cervix before 
using a forepaw to roll her over on her back and nuzzling her cheek.

Tiredly, she says in a near whisper, "That was even better than when we 
mated with you in your stuffed animal form."

Laying a forepaw protectively over her chest, he replies, "Sorry if I 
was too rough, I don't have much experience being with an actual 
female..."

Lifting her hand to rub the side of his muzzle, she replies, "It's okay, 
I really enjoyed myself as well. Just warn me next time you want to mate 
me in your true form, okay?" Thinking a bit, she asks, "How did you 
handle your mating season when Clow Reed was around?"

Scratching the side of his head, he replies, "I tried to convince him to 
create another of my kind to serve as my mate, but the best he was ever 
willing to give me was a construct forged with The Create."

Sakura replies, "Do you think my powers have grown enough for me to 
create a mate for you?"

Thinking a bit, he replies, "Probably, and Eriol could probably give you 
advice since he was able to create Spinel Sun and Ruby Moon, but as long 
as your willing to be my mate, I don't need another of my kind."

Giggling, she says teasingly, "Even if I can't give you any cubs?"

Blushing, he stutters, "Uh... well...that's"

Deciding to have mercy on the embarrassed beast, she says, "It's okay, 
I'd be glad to be your mate for as long as you like, or at least until 
Syaoran can return from Hong Kong, and I'd be glad to create another of 
your kind whenever you decide you want someone of your own kind to bare 
you children, or even figure out how to let me concieve a child with you 
if you so desire."

He stutters, "You...You don't need to go that far for my sake."hearing 
her giggle, he decides to change the subject, "Shouldn't you use Bubble 
to clean up the mess we made?"

Yawning, she replies, "I'll do it in a little bit, right now, I think 
I'll take a little nap." before dozing off.

With some difficulty, Keroberos manages to pull the comforter out from 
under Sakura without waking her and drape it over the card captor's 
sleeping form before returning to his plush-like formand cuddling up 
next to her before dozing off himself.