Rin knew pretty much the second after she'd done it that taking Zelretch's advice had been a massive mistake. With Shiroko and Saber in tow, she had sought to take her mentor's advice and tap into the Second Power, but what he'd given her was not instructions on how to master the purest and highest form of magic in the world. It was a spell to open up a portal into another dimension entirely. A dimension from which a writhing mass of tentacles immediately spilled out, aggressive and incredibly forward as they took all three girls by total surprise, none of them ready enough for what came out to even begin to brace themselves or defend against the incoming ensnaring.

Saber had the closest thing to a proper reaction time as she went for her sword, but her wrist was caught just short of grasping it and was quickly pulled back, held in place by the writhing tendril. There was little Saber could do about it as her other hand was caught before she could fumble for the blade with her off hand, while Shiroko and Rin didn't even have that luxury. "I'm going to kill him!" Rin was heard yelling amid the chaos, but everything else was just noises.

All three of the girls were quickly dragged side by side onto their knees, hands all raised as tentacles shot forward from the portal, claiming their mouths with swift, aggressive fervor. None of them were prepared for the tentacles to lash forward, or for them to start fucking their mouths immediately, leaving them all gasping and whining, squirming against the bindings as thick pre-cum leaked from the tips pounding forward. Their mouths filled with a tingling sensation as the aphroditic pre-cum enforced an immediate arousal and cooperation within therm; there was no playing around from the denizens of this dimension.

The more narcotic pre-cum the girls were fed, the less they struggled, the noises of frustration immediately dying down as lust bubbled up quickly within them. None of the girls were ready to fight this, unprepared for the tentacles or the danger their addictive pre held, which left them surrendering without much of a fight at all to the lusty pleasures and the desire for their bodies to be used by the extra dimensional tendrils. They couldn't do anything to stop it, couldn't hold back against the deep, throbbing urges that took them quickly. Being so unready for this only left them even more vulnerable to the otherworldly creatures seeking to use them, and each mouthful of delicious pre they swallowed down left them more and more vulnerable.

Shiroko was the one who deepthroated a tentacle first. She hadn't even meant to, but it hit her so quickly, left her trembling as it plunged down her pristine gullet, left her gagging noisily as she shook a bit from the sudden pressure. But she didn't stop, in fact leaning forward and moaning around the tentacle, as if pleading it for more, eyes lusty and glazed over as she took quickly to the effects of the aphrodisiac. Her thighs rubbed together excitedly, her pussy getting wetter with each passing moment.

Saber and Rin both found themselves claimed deeper with a single stroke, their bodies trembling and stiffening up as the tentacles forced their way down their throats in tandem once it was clear Shiroko could take it. The pace quickly evened out, settling down into a steady, brutal pace as the girls all gagged in unison from their steady and simultaneous facefucks, treated to the same roughness all at once as more tentacles spilled through the portal, ravenous and lusting after flesh as they found themselves on a new plane and with vulnerable women whose bodies were theirs for the plundering.

All three of them took oddly well to the aggressive use of their mouths, moaning loudly as they went limp in the grasp of the tentacles. Their legs parted, begging the tentacles to take them more as their bodies heated up with lust, driven further into the twisting, heated need that seemed without pause. There was a rhythm to the noises they made as they were taken, but the gagging only seemed to further work the others over, entice them as eye drifted back and forth between each other in excited, curious fervor steadily growing in intensity. In the backs of their minds, something forbidden sparked up, something that knew embracing these creatures and their pleasure was 'wrong', but it translated that wrongness into something covetous and needy.

The tentacles worked in and out of their mouths with steady, unwavering precision, and none of them could have expected release when they did, gasping in shock when they found their mouths suddenly filling with hot spurts of cum. The taste took a second to hit them, powerful and expectedly very addictive, leaving their mouths tingling with need as the tendrils pulled back, left a few more shots across their faces and cum dripping from their mouths. Their eyes were glazed over, and as their wrists were released, the girls didn't immediately turn to run away.

They turned toward each other.

"Maybe this isn't so bad after all," Rin murmured, voice airy as she turned toward Shiroko and licked her way up the girl's chin, lapping at some of the cum leaking from her mouth, and working her way up to her lips.

"Yes, let's forgive Zelretch for this one, perhaps," Saber noted, leaning in to her master with a smile and kissing her way up her chin as Rin seized her lips. With their hands all now freed, they settled their touches immediately onto one another, Saber and Rin both starting to peel away Shiroko's clothes while she in turn lifted up their skirts.

Shiroko moaned into Rin's lips as she swapped the cum back and forth between their mouths, before pulling back and giving Saber a kiss too. The girls quickly fell so deeply into their own touch and attention that they didn't even notice for a moment that the tentacles waited about, leery and encircling them as they awaited an opportunity to strike. There was something almost too calm about the silence of the moment as the weaving and bobbing cocks sought their opening, the ripe moment to strike when the girls had finished paying each other a little adoration first. They waited until Saber had pulled from Shiroko's kiss and swapped the cum back to Rin before they shunted forward and struck again.

The girls moaned as the tentacles waylaid them, the three of them shivering as they felt their clothes getting tugged at. "Yes, take me," Shiroko moaned, legs opening up wide as she stared happily at the writhing tendrils, her dripping pussy so ready for them. She gasped and bucked her hips upward, soon met by a slithering tentacle slamming its way into her pussy, making her cry out and lean back against Saber for support as she was taken. The searing bliss that ran hot through her body left her shuddering in delight. "It feels so good!" she cried out, kissing Saber again as the tentacle began to vigorously pump its way deep into her needy pussy.

Saber gasped out in surprise as two more tentacles took her, claiming not only her pussy too, but also one slithering up further back and slowly working its way into her ass. The blonde twisted in delight as she felt it worm its way into her, double penetrated by the thick cocks  as she leaned tightly into Shiroko, kissing her excitedly in turn as she let the tentacles work at her body. A hand reached up to fondle Shiroko's breast while the other spread her master's legs a little wider to accept the cock deeper into her needy pussy. "Just wait until you feel two inside of you at once. It's amazing.'

Rin was about to say something about how unfair it was that Saber was getting two and not her, but a cock quickly cut her off instead, leaving the black-haired mage to happily start sucking on another dick as her legs spread wide for another cock too, her pussy quickly claimed like the other two's were. She happily slurped the cock down, a hand reaching up and even grasping the pumping tendril, stroking it quickly as it plundered her mouth as she burned with a special, shuddering sort of adoration for the thorough use of her mouth. She was loving the feeling, loving the way that she burned hot and needy with the desperate swell of pleasure that came from being used.

The narcotic pre-cum continued to feed the girls' libidos as they all took the harsh tentacle poundings in different ways. Shiroko couldn't even be jealous that the other girls got to enjoy two tentacles when she only had one due to the fact that her pussy lit up with pure delight as she was taken, never having felt better than this before in her life. She clung to her servant tightly, making out with the blonde with everything she had as their bodies rubbed together, while one hand reached for Rin, cupping her small breast and trying her best to adore her with a loving touch as the three of them indulged in her mistake together, not the faintest bit of regret to be found in the way they were all so intensely taken.

All three pussies were plundered by the eager tentacles, with Saber's tight ass and Rin's hot mouth certainly extra delights for the needy tendrils, but not yet enough. The purpose with which they moved wasn't only for pleasure, but to seed the girls, to impregnate each of them and leave them carrying their otherworldly progeny, and to that end, the tentacles worked their pussies over harder and with more focus than anything else. The pleasure from everything else helped sate their hungers, and certainly eased the girls down even deeper into their pure submission, but the goal was to cum in their holes again and again until conception was a pure certainty, the magic of their cum not only addictive, but inducing fertility through magic.

As much as the girls loved getting fucked, they found the finale was much better. None of them were even on the brink of orgasm when the cocks fired off their loads, hot cum pumped into their aching pussies setting them off all as part of the magic being worked on them. They screamed out in delight, Saber especially as her ass was creampied as well, while a gagging Rin's moans were muffled as a load was deposited down her gullet. They twisted and heaved together, writhing in orgasmic bliss as their climaxes pushed them even deeper into the slavish reverence of what was happening to them, loving the tentacles and craving even more, not willing to stop until they got every last thing they wanted.

The tentacles were more assertive this time in what they wanted of the girls as they moved them hurriedly into the position they wanted of them. Saber was laid down onto the ground and swiftly triple penetrated, with the cock that went for her mouth running up her body and between her breasts on the way. Then there were Shiroko and Rin, guided onto their hands and knees over Saber and swiftly taken in both holes from behind, crying out in delight as their asses were claimed and the pure sensation of fullness that came from that fact leaving them crying out as they buried their heads down into the blonde's tits.

The two masters were very quick to figure out what they were being expected to do as they pressed Saber's breasts together, leaning in and sucking each on one of her nipples as they formed a tighter, fleshy prison for the cock taking her mouth to thrust into, a simultaneous titfuck and blowjob fueled by a heated and desperate writhing from all three of the creatures' willing 'victims'. Saber moaned loudly even amid the sloppy choking noises she made as the oversexed tentacle drove down deep, not satisfied even with her mouth and her tits all at once, craving more from her body as it took every last shred of stimulation it could get. 

"I love your breasts," Rin moaned with a raw shudder as she admired the perky tit, gladly giving the hardened, pink nipple all of the adoring suckling it deserved. There was no shame to be found in adoring and even worshiping the breast of someone she had never paid too much mind to sexually before as suddenly all of her attention turned toward Saber and Shiroko. She couldn't keep from loving every inch of their bodies, her eyes longingly dragging along their forms and adoring her new lovers. The tentacles weren't only making them crave getting fucked by the long, thick, prehensile mass of cocks, but also lusting after each other, coming together as lovers who would soon bear the triplet spawn brewing within their bodies.

Shiroko pushed her hips back against the tandem thrusts into her dripping twat and her needy ass, loving the feeling of both holes stretched out a little by the thick penetrations, filled right up to her limit, and then pressed tight against said limit as they hammered her deep and fast. She had never known pleasure like this before, unable to stop making all sorts of delighted noises as she sucked on her servant's breast, staring enviously at the tentacle thrusting up through them, wishing she had the breasts to take such a delightful treatment herself, but hoping that Rin and Saber would take a turn to adore her tits at some point soon.

Then there was Saber, who couldn't speak as she gargled around the cock plunging down her throat, penetrating her deep and hard to the absolute delight of the blonde, who had a cock in each hole pounding her raw and two beautiful woman worshiping her breasts, the absolute center of attention and under so much pleasure that she simply couldn't handle it all. It felt so good, the searing bliss of indulgence hitting her in every different way as she was utterly satisfied, every most sensitive part of her body lavished with either affection or pure lust to her immense satisfaction. Triple penetration was the height of being used by the creatures, whom she craved for the use of her body by as she was hit with more of the addictive nectar down into her stomach that left her happily subservient.

But that paled in comparison to the paradise that came when all three cocks actually fired off into her.

Even a cock in her throat couldn't fully silence Saber's screams as she lost herself too. The flooding of cum into every hole all at once would have pushed her over the edge even if the cum weren't expressly designed to do exactly that. She made plenty of noise as her hips bucked off of the ground and she convulsed in searing bliss on the ground, pumped full of cum as her body ached with the throbbing, crashing waves of pleasure that only left her wanting more, the sickening endless cycle of lust that the creatures fostered eagerly. Having her tits sucked on the entire time was only icing on the cake.

Shiroko and Rin fell victim to the same treatment seconds later, slumping down onto Saber and writhing their naked bodies against her as they were seeded again, receiving another load into their wombs and one pumping into their asses, leaving everyone now a mess with at least one load in each chamber and shuddering, delightful feeling that they weren't going to be shaking those delights any time soon.
**********************
Zelretch took his sweet time in going after his apprentice after he'd given her the means of opening up that portal. He felt in no particular hurry to do anything too hasty as his 'good natured prank' would have led to Rin enjoying quite a bit of fun all her own. But he couldn't leave her to the wolves forever. When he arrived to clean up the mess of his 'joke', he found the three women all sloppy, cummy messes, down on their hands and knees with a cock in their pussy and in their mouth each, spitroasted by the tendrils and fed a steady diet of cum into their bellies, which swelled out slightly not from how much cum they'd drank, but because their bodies had already taken to the twisted extra dimensional seed that left them all now in the very early stages of alien pregnancy.

It wasn't much effort at all for the mage to dismiss the portal, the tentacles sucked back into their realm and the three fuck-addled, impregnated women to look around in curious worry, frustrated by the sudden dismissal of their tentacular lover as they were still left craving more. But with the portal closed, a certain clarity settled over them, a realization of what was going on setting in as they looked down at their bodies, certain that the cum oozing from their gaping pussies was a more than ample sign the bumps were indeed the mark of their pregnancy, and there should have been panic, but instead, as they slumped against one another, so much cum on their bodies that it almost provided a modesty against Zelretch's gaze, they couldn't even think to complain about it.

Rin wanted to be mad at Zelretch for what he'd done, even if she'd enjoyed herself. If only because he'd lied to her and knowingly let her get knocked up by tentacles. But all she could ask was a simple, shaky question as her hand snaked down into Shiroko's lap to toy with her leaking pussy. "What did that thing just give us?" she asked, bottom jaw trembling. The lust addiction wasn't something she was going to shake any time soon. If ever.

Zelretch simply gave Rin a smile and a cryptic, "You'll find out soon enough."

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