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It Only Makes Sense

Summary:

Kakyoin has a slimy green tentacle monster at his disposal. Kakyoin has a boyfriend who is (secretly) a freak. Really, what comes next is only logical.

Notes:

My late birthday gift to Kakyoin is that he gets laid.

(See the end of the work for more notes.)

Work Text:

"You know, I wasn't expecting you to go along with this so easily," Kakyoin muses, popping the buttons on the cuffs of his sleeves so he can roll them up. His uniform jacket is discarded on the desk chair behind him, unnecessary when the two of them are alone in Jotaro’s remote corner of the Kujo mansion.

"If this is what gets you going, it's not like I have a reason to say no," Jotaro replies flatly, looking off to the side.

Kakyoin can barely keep his lips from curling into a grin at the lie. Jotaro’s tan skin is flushed from more than just the heat of his recent bath, and in just the past two minutes, his pink tongue has darted out to wet his lips no less than five times. 

Really, who does Jotaro think he's fooling?

After all the time they've spent together, he can read the other man like a book. Every change in his appearance, his mannerisms, the number of wrinkles in his brow, all spell his true feelings out in capital letters. 

Well, it's not as if Kakyoin minds. In fact, it's quite nice to know he's not the only one feeling eager and expectant right now, especially with how awkward he'd felt approaching this subject in the first place.

Jotaro sits on the edge of the bed while Kakyoin stands, a rare opportunity to look down on the enormous man. He can see the water dripping down from the edges of his wet and uncovered hair, soaking into the collar of his tank top. Kakyoin wants to trace the trails of water with his tongue. He earmarks the idea for another time.

"I don't know," he says instead, and feels some fraction of himself spread out, uncoil beyond his body's borders. "I wasn't sure you would consent to being, well, restrained like this."

“I said I didn’t mind,” Jotaro repeats, crossing his arms across his chest defensively. Kakyoin can’t help but think this two-meter tall living weapon is cute for being so antsy, and adorable for thinking he’s actually hiding it.

“As long as you’re sure,” says Kakyoin mildly, unable to keep himself from teasing a bit. “After all, I’d hate for you to feel as if I’ve pressured you into going along with my whims.”

Jotaro all but rolls his eyes. He must pick up on Kakyoin’s sarcasm, because his brow is furrowed with a bit of genuine annoyance as he turns his head to look at him.

"What do you want, a signed waiver that says you can fuck me-"

Mid-sentence, Kakyoin makes first contact. A silver and green tentacle, no more than two fingers in width, snakes around Jotaro’s ankle. He can see the man’s lips part in surprise for a fraction of a second, before Hierophant’s tendril yanks Jotaro’s foot off his bedroom floor.

Kakyoin half expected Jotaro to anticipate the action and remain unaffected, but it appears that he was otherwise occupied. The man is thrown off balance and falls backwards, broad back landing heavily on the mattress. Despite the uncharacteristic lack of grace, barely a grunt of surprise leaves Jotaro’s throat.

Kakyoin takes a few steps forward, practically looming over Jotaro’s prone figure. Seeing his form splayed on white sheets, his tan, muscular body obscured by only the flimsiest scraps of fabric, looking almost helpless to Kakyoin’s greedy, roaming gaze, it flips a switch in him.

“I hardly think a contract is necessary,” he says, his mild tone a direct contrast to the predatory grin on his face. “Not when you look like you want it so badly.”

Jotaro scowls, or rather, bears his teeth in warning. Kakyoin expected nothing less. He hasn’t done nearly enough to make Jotaro forget about his pride. At least, not yet.

“I think you’re making some pretty big assumptions,” Jotaro says, beginning to push himself onto his elbows. Kakyoin can’t have that, now.

Hierophant surges forward in the form of dozens of tentacles, each with a specific directive. They wrap around Jotaro’s limbs, simultaneously weaving around the bed frame. They lash Jotaro to the bed, subtly arranging him with his hands on either side of his head, palms facing upwards. If Jotaro feels any revulsion or distaste at being bound by Hierophant, he must repress it well, because Star Platinum makes no appearance. Kakyoin surveys his work with a critical eye, before humming lowly in approval. 

“Maybe,” he acquiesces to Jotaro’s statement. “But not without reason.”

“After all,” he continues, relishing the sight before him. “Can you give me any other explanation for why you chose to take a bath right before I came here, then walk around in front of me in little more than your underwear?”

The tendril wrapping around Jotaro’s bicep uncurls just enough to pluck at the strap of his purple tank top. At the inside of his thigh, a tentacle brushes just inside the hem of his boxer briefs. A shudder goes through his body, and Kakyoin perceives it through Hierophant. 

Jotaro’s teeth sink into his plush bottom lip. His dark brow furrows, and Kakyoin can tell he’s trying not to get turned on, and risk losing whatever arbitrary game he thinks he’s playing. Yet, his eyes tell all, a thin ring of extraordinary green around a dilated dark pupil. Jotaro is five minutes away from losing his mind.

“You’re exaggerating,” the man protests, likely just to be stubborn.

The tendril wrapping around Jotaro’s left calf moves, hoisting the limb up and to the side. Jotaro tenses, and Kakyoin feels him instinctively try to close his legs, to keep himself from being exposed. Kakyoin allows the tentacle to put slightly more force into its tug, to momentarily put a bit of a strain on Jotaro’s limited flexibility, and is pleased to feel Jotaro relax into the motion. It’s satisfying beyond words, to see a man conditioned to fight until his last breath give in and let go. It’s not too bad a sight either, with Jotaro’s boxers shifting, the milk-white skin of the inside of his muscular thigh exposed to Kakyoin’s lecherous gaze.

For the first time today, Kakyoin touches him directly, his pale hand encircling Jotaro’s ankle, overlapping with Hierophant’s ghostly grasp. Even with him laying  on the low bed, Jotaro’s legs are long enough for his heel to rest just above Kakyoin’s shoulder. Kakyoin turns his head, gently pressing a chaste, worshipful kiss against the inside of his ankle. His eyes meet Jotaro’s, his gaze unwavering.

“Do you really not know what you look like right now? What it does to me?”

Jotaro’s face is well and truly flushed, embarrassment and lust broadcasting in equal measure. Even with “clothes” covering him, one glance is enough to see the burgeoning arousal between his legs. When he speaks, his voice is rough and deep, attempting to retain its normal strength.

“I can guess, when you look at me like you want to fucking eat me alive.”

Kakyoin chuckles.

“Got me there.”

The tentacles curled about Jotaro’s thigh unfurl, slipping treacherously up the openings of his underwear. They slither inside his clothing, teasingly stroking along his hips and groin. As extensions of Kakyoin’s conscious and unconscious mind, Hierophant’s limbs almost seem to display a sentience of their own. They shamelessly grope Jotaro’s body, coiling and squeezing at his muscles.

Abruptly, Hierophant uses its grip to pull Jotaro’s hips up and off the bed, his entire lower body now solely supported by Hierophant. A noise of surprise leaves Jotaro’s lips, only to transform into a groan as another tentacle strokes firmly over the outside of his underwear, finally providing stimulation to his cock, if only indirectly.

Hierophant’s tentacles roam about Jotaro’s torso, massaging at his chest with deliberate, squeezing motions. Jotaro grits his teeth and squeezes his eyes shut, as if determined not to make a sound, even as the bulge in his underwear continues to grow to full mast. For a moment, Kakyoin enjoys Jotaro’s minute squirming as the tentacles get to work on him, before deciding that even the thin, damp fabric of Jotaro’s tank top is too much of a barrier to his gaze. 

Hierophant’s tentacles flip up the bottom of the tank top, exposing the soft, flushed curves of Jotaro’s muscles. The tips of the tentacles move under Kakyoin’s greedy gaze, rubbing firmly over Jotaro’s hard nipples.

Even through his clenched teeth, Jotaro lets a strangled moan scrape through, music to Kakyoin’s ears.

“Just as sensitive as ever, I see,” he says, his right hand petting absentmindedly over Jotaro’s calf. “I swear, it’s as if you were made for this kind of thing.”

“Shut…the hell…up,” Jotaro grits out, his typical reaction to hearing the filthy thoughts that Kakyoin voices during sex.

“Feeling shy, are we?” Kakyoin asks flippantly, and chuckles at the growl he gets.

“Just get on with it,” he manages to bite out.

“Hmm,” Kakyoin hums, amused. “I don’t think I will. Or at least, not too quickly. You’ve given me a rare opportunity here. I should show my gratitude by savoring it properly.” At that moment, Hierophant’s tentacles flick at Jotaro’s nipples, eliciting another stifled noise, slightly higher in pitch than his usual gravelly timbre.

Hierophant snakes down Jotaro’s tensed stomach, disappearing into the waistband of his underwear. Leisurely, it wraps around the shaft of Jotaro’s cock, and Kakyoin can feel the warmth and weight of it as if it were in the palm of his hand. Still, it feels like a waste to have anything concealed by fabric. Other tentacles drag Jotaro’s underwear down, until the flimsy scrap of fabric hangs off his suspended ankle, like a white flag declaring surrender.

The tentacle about Jotaro’s cock spirals up the length of it, until the flat of the tentacle rubs over the head, much like Kakyoin’s thumb would normally. Precome bubbles up under the tentacle, letting it glide over the sensitive glans, drawing a grunt from Jotaro. Jotaro’s suspended hips tremble under the ministrations, attempting and failing to thrust upwards, seemingly helpless against the creature that holds him.

Though Jotaro's cockhead is slick and dripping from Hierophant's touch, it's hardly enough lubricant for what Kakyoin has planned. Good thing he has something in mind to remedy that.

"Emerald Splash."

Jotaro’s eyes blink open in surprise at the command, but no explosion of gemstones rips through the air. Rather, from the tentacles that trap him, a thick, viscous liquid begins to ooze. A thematically appropriate emerald green, the slime drips over Jotaro’s body, slicking the way for the tentacles, including the one jacking Jotaro off at a torturously slow pace.

“Gross,” Jotaro moans, unable to offer up the barest facade of disgust. “What even is this?”

“Just something I thought might be useful,” Kakyoin says with a grin. “It certainly saves us the trouble of buying lube, doesn’t it?”

“You’re such a goddamn pervert,” Jotaro manages to say, though it’s hardly a biting insult, what with the way his chest heaves for breath and his hips twitch into Hierophant’s teasing motions.

“Can’t say I disagree with you. Not when I’ve been thinking of having you wrapped up like this ever since the day you agreed to my request. Though, to be honest, I’d been playing with the idea for a while before that.” To punctuate, he begins to remove his belt, calling attention to the prominent bulge in his uniform slacks. Kakyoin sees the way Jotaro’s eyes follow the motion, the way his throat bobs when he swallows the saliva that fills his mouth.

“You’re so damn weird,” Jotaro rasps out, a hypocrite to the end. Still, Kakyoin withdraws Hierophant from his cock, the lack of stimulation drawing a frustrated growl from Jotaro. Kakyoin laughs lowly, thoroughly enjoying himself. He steps forward between Jotaro’s obscenely spread legs, placing a possessive hand on the inside of his thigh. Jotaro’s eyes watch him, teeth digging into his lower lip as he watches Kakyoin’s every move with anticipation.

“You expect me to believe that you didn’t think about it either? That you weren’t thinking about what I’d do to you, how it would feel to be touched everywhere at once?”

Hierophant’s tentacles slip lower, leaving trails of iridescent green slime on Jotaro’s skin. They grasp at his ass greedily, spreading his ass cheeks and revealing his twitching hole. The tentacles edge closer to his entrance, eager to ruin Jotaro completely.

“You didn’t wonder what it would be like to have Hierophant string you up, fuck you, use you, all so a pervert like me could watch?”

Hierophant’s tentacle drags a tentacle roughly over Jotaro’s hole, at which he throws his head back against the bed and moans a curse. Kakyoin watches without blinking, barely sparing the thought to grind the heel of his hand against his own clothed cock. He hisses at the pressure, attention remaining on the tentacle rubbing at Jotaro’s hole. It presses down teasingly, just barely dipping inside, before withdrawing and flicking at his rim, almost like the prehensile tongue of some ravenous monster.

Jotaro tries to spread his legs wider within Hierophant’s grasp, as if attempting to urge the tentacle inside. Kakyoin grins, pleased. He loves it when Jotaro loses his mind enough to act like a slut.

“I’ll go ahead and give you what you want, since you’re shaking your ass so nicely.”

Jotaro startles, his face flushing with indignation.

“I wasn’t shaking my-”

Whatever lie Jotaro was about to say turns into a beautiful moan, as Hierophant’s teasing turns into a slow, inexorable thrust into Jotaro’s ass. Though the tentacle is thin, Jotaro’s walls are vice-like, constantly fluttering and clenching around the inhuman appendage.

Jotaro’s body has begun trembling as Hierophant squirms within him. His brow dark brows are furrowed and his mouth hangs open, appearances forgotten as he turns himself over to pleasurable, alien sensation.

However, Hierophant isn’t just any tentacle monster. It’s an extension of Kakyoin’s own mind, and it knows everything there is to know about Jotaro, from all the countless times Kakyoin has painstakingly taken him apart and brought him to orgasm.

Hierophant twists and curls inside Jotaro momentarily, before deliberately pressing against his prostate with a firm, grinding motion.

The reaction is spectacular, even more than Kakyoin was hoping for. Jotaro all but shouts a moan, hips jerking against Hierophant’s hold as his cock twitches and shoots out cum, creating a puddle on the floor between them. Immediately after, he sags into Hierophant, exhausted.

Kakyoin stares at the scene before him, surprise and delight filling him in equal measure. He smiles at Jotaro, who barely looks like he knows where he is, lost in some kind of post-orgasmic haze. Kakyoin lets him float for a moment, petting indulgently at his thigh. 

“Looks like someone was more worked up than I thought,” he notes out loud.

Jotaro seems to come back to himself a bit, looking at Kakyoin for a moment, before flushing and averting his eyes.

“Sorry,” he mumbles, embarrassed and recalcitrant. It’s certainly a cute reaction, but hardly necessary, in Kakyoin’s opinion.

“Don’t be,” he says with a genuine smile, before leaning in, the angle somewhat awkward due to Jotaro’s raised hips. Still, he cradles Jotaro’s warm, sweating face with a spindly hand, before pressing a kiss to that panting mouth. 

“You were amazing,” he adds, after pulling back to offer a reassuring smile. “Did it feel good?”

Jotaro nods mutely, leaning into Kakyoin’s hand.

“Do you think you can give me another one, darling?”

Normally, a term of endearment such as that would have Jotaro scowling or accusing Kakyoin of being a sarcastic asshole. Right now, though, he just nods with a slight hum of acknowledgement.

It’s always like this after the first orgasm. Jotaro feels things so intensely, be it pain or pleasure, rage or affection, even if he often finds himself unable to express it. Being brought to the peak, being the sole focus of Kakyoin’s lust and attention, it seems to break down some of his barriers. At times like these, Jotaro’s priorities seem to shift, from maintaining his composure to simply seeking pleasure and closeness. Though Kakyoin has no small amount of love for the usual Jotaro, he must admit there are perks to him being particularly pliant. He presses another peck to Jotaro’s cheek, before withdrawing.

“Thank you, darling. Me and Hierophant will make you feel good.”

Jotaro nods slightly and relaxes, his hands no longer balled into fists on either side of his head. Kakyoin offers him a smile in return, before redirecting his attention to Hierophant, which has been gently roaming and stroking Jotaro’s body with no real aim.

Kakyoin tries to slowly build up Jotaro’s arousal again, massaging at his chest and nipples, similarly to how he started before. However, whether it is because of heightened sensitivity or lowered inhibitions, he’s much louder this time. When Hierophant pinches and rubs his chest, he lets loose sighs and moans frequently, when earlier he chewed his lip nearly bloody trying to silence himself.

Hierophant coaxes Jotaro back to full hardness with long, languid strokes of his cock, using copious green fluid to ease the way. Jotaro’s soft noises and the sounds of slime being rubbed over his cock combine, creating a filthy soundtrack that sets Kakyoin’s ears on fire.

Unable to resist any longer, he pops the button on his uniform slacks and drags the zipper down, hastily pulling his own cock from his underwear. Soon, the sound of his own heavy breathing joins Jotaro’s as he strokes himself to the tempo he set with Hierophant.

The lone tentacle within Jotaro’s ass begins to pump in and out slowly, adding further stimulation. Soon enough, even without Hierophant massaging his prostate, Jotaro’s hips begin to shake. 

Kakyoin adds another tentacle, prodding at Jotaro’s rim before slipping inside with a squelch of slime. Within Jotaro, the two tentacles twine around each other, creating a thick pseudophallus that thrusts in and out of Jotaro forcefully. Small, punched-out noises leave Jotaro every time Hierophant fucks into him, the thickened tendrils rubbing over his prostate. 

Jotaro’s hole stretches obscenely around Hierophant, his ass shiny from the sheer amount of otherworldly slime leaking all over. Kakyoin’s hand is a blur on his cock as he hunts down his own end, seeking nothing else but to add his own cum to the mess on Jotaro’s ass.

Jotaro raises his head, his expression debauched and lustful. His lips are pink from chewing on them, and his eyes full of unshed tears from the borderline overstimulation he’s experienced. Yet, when his eyes fall on Kakyoin’s cock, determination emerges from the haze of arousal.

“Noriaki, stop,” he says, his voice hoarse but still urgent.

Immediately, Kakyoin brings Hierophant’s movements to a stop. He releases the tendrils tying Jotaro down, and loosens the ones holding him, giving him room to move without dropping him.

“What’s wrong? Does something hurt?”

Jotaro turns his head to the side, pausing the way he always does when he can’t think of how to put together words that convey his actual meaning.

“I don’t want Hierophant to fuck me any more,” he says slowly.

Kakyoin nods. It’s not within his principles to argue with a statement like that, though he can’t help but wonder why.

Then, Jotaro looks up at him seriously, through lashes as thick and dark as any model’s.

“Can you do it instead?”

Kakyoin stares, uncomprehending and frozen. When the meaning finally reaches him, a red-hot flush spreads across his face as well, which he instinctively covers with a hand.

Adorable. This two-meter tall, first-class-delinquent, living weapon of a man is absolutely adorable.

Kakyoin takes a deep breath to calm himself before looking back at Jotaro.

“Y-yeah. I can do that,” he says, voice cracking slightly. Jotaro looks slightly relieved by his agreement, which nearly has Kakyoin losing his composure all over again. 

Hierophant slides out of Jotaro’s hole, leaving it wet and twitching. Kakyoin swallows heavily, attempting to reign in his arousal. Just moments ago, he’d been near the precipice of his release, yet now he hardly wants it to end.

He places his hand on Jotaro’s hip, though he supposes it’s unnecessary with Hierophant holding him. Still, it’s nice to feel the blazing heat of his body temperature directly through his palm, to grip his lean waist directly. Jotaro shivers, a direct reaction to Kakyoin’s poor circulation.

For his own benefit, Kakyoin guides his cock into Jotaro’s hole carefully, attempting to adjust to the overwhelming sensation. Though certainly shorter and less flexible than Hierophant, his cock is thicker, and Jotaro walls grip tight around him as his entrance stretches to accommodate him. 

Below him, Jotaro lets his head fall back against his sheets, eyes fluttering shut as he lets out a sigh that turns into a soft moan. He looks utterly blissed out, just because he finally got Kakyoin’s cock in him. Kakyoin can’t decide if that’s hot or endearing, or perhaps both.

Kakyoin’s thin hips meet Jotaro’s, and he pauses, buried deep inside. Jotaro’s insides are searing hot and constantly twitching around his cock, and Jotaro keeps shifting his hips minutely, pressing Kakyoin’s cock as deep as possible. Frankly, it’s bringing him halfway to climax without him even doing anything.

Deciding to put a stop to that, Kakyoin tightens Hierophant around Jotaro’s waist and hips, forcing him to remain still. Then, he begins moving. He sets a steady pace of deep, slow thrusts that drag over Jotaro’s prostate. Each push of his hips elicits moans and sighs, now punctuated by the slap of skin on skin.

Still, as measured as he’s trying to be right now, Kakyoin knows he can’t last much longer. He sets Hierophant to work again, stroking Jotaro’s cock in time with each of his well aimed thrusts.

Suddenly, Jotaro lifts one of his hands off of the mattress, shakily reaching upwards towards Kakyoin. He says nothing, but his expression belies a quiet desperation. Kakyoin needs no further urging, as he reaches out and laces his long, thin fingers with Jotaro’s strong hand. Jotaro gives him a dazed, satisfied grin, before his eyes flutter shut with pleasure. At that moment, Kakyoin wishes desperately that he could reach to kiss him.

Instead, he settles for the next best, albeit somewhat strange, method.

One of Hierophant’s tendrils crawls up the length of Jotaro’s body, before brushing over his lips. Jotaro, once again proving that he is just as strange as his boyfriend, opens his mouth, allowing the tendril in. 

Hierophant strokes the inside of his mouth, expressing Kakyoin’s desire the only way a tentacle can. Jotaro reciprocates, laving his hot tongue over the tentacle, before closing his mouth to suck on the tip. It’s the strangest cross between a kiss and a blowjob Kakyoin’s ever received, the odd sensation sending lightning down his spine.

“Careful,” he says once he feels like he can string a sentence together. “You’ll make me jealous.”

Kakyoin’s pace has sped up, snapping his hips into every thrust. He pushes in at the same time Hierophant pulls Jotaro forward, impaling him on his cock. He thinks Jotaro tries to curse out loud, but with Hierophant in his mouth, all that comes through is a garbled moan. He can see moisture glittering in the black hair at his temples, helpless tears against the onslaught of sensation.

Hierophant is jacking Jotaro off in earnest, causing him to become increasingly tight as he approaches his second orgasm. His grip on Kakyoin’s hand is nearly crushing in its intensity, but Kakyoin simply tries to match his strength, the pain an insignificant factor right now.

“Come on, darling,” he says, adoration dripping from every syllable. “Let yourself go.”

Jotaro throws his head back as he orgasms with a cry. Cum splatters across his abdomen, and he convulses around Kakyoin’s cock, forcing him to come as well. Kakyoin’s hips twitch forward helplessly, and he cries out as he spills inside.

After several long seconds, in which Kakyoin is uncertain whether his heart has stopped completely, or is simply racing so fast he can’t feel his own pulse, Jotaro’s hand relaxes, no longer in danger of snapping Kakyoin’s fingers like so many popsicle sticks. Their sweating palms remain flush together, and Kakyoin is uninclined to let go anytime soon.

Still, he feels almost utterly exhausted at this moment, and imagines Jotaro could use a break from the improbable position he finds himself in. Hissing from oversensitivity, he withdraws his dripping cock from Jotaro’s ass, and has Hierophant slowly lower his hips and waist back to the mattress. Kakyoin himself sits down heavily on the bed, and Jotaro gingerly turns to lie on his side, curling his legs up onto the mattress as well.

Now that his job is complete, Kakyoin dismisses Hierophant. All the remaining tendrils withdraw into his silhouette, and the thick slime that had dripped onto Jotaro and the bed disappears, leaving behind only their cum.

Kakyoin gently brushes Jotaro’s hair out of his face, finding it to be damp with sweat and tears. Jotaro’s face is peaceful and unlined, his eyes closed to rest. One would almost find it hard to believe that he’d been getting his brains fucked out just a second ago, instead of sleeping quietly.

“Tired?” Kakyoin asks quietly.

“What do you think?” Jotaro replies, not even deeming the question worth opening his eyes. Kakyoin watches him for a moment more, before deciding to continue teasing.

“I think it was worth it, though.”

Jotaro’s eyes remain shut, but his face flushes tellingly. Kakyoin laughs a bit at his expression.

“Hey, Jotaro,” he says. “Now that you’ve had both me and Hierophant, which do you prefer?”

“It’s a toss-up,” replies Jotaro, with barely a moment’s hesitation.

“Really? That hurts.”

“Hierophant talks a hell of a lot less,” Jotaro says, unrepentant.

“Well, we could always have a rematch for you to decide,” Kakyoin jokes.

Finally, Jotaro opens one green eye, likely to gauge how serious Kakyoin is. He shuts it, and pillows his head on his arm.

“After a nap,” he says.

“After a nap,” Kakyoin agrees, grinning.

Notes:

I feel like this is an occasion that should be commemorated. Like, I should sew a patch that says "I Write Tentacle Porn On The Internet" on my favorite jacket. Anyway, I really wanted a fun project to work on, and I was secretly hoping for more views by posting in the still-going-strong JotaKak tag, so I would love it if you could leave some feedback for me. I literally never delete comments from my inbox, I keep them there for whenever I'm feeling down and unmotivated, so know that if you shoot me a comment, it will have a loving forever home.