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Always Read the Fine Print

Summary:

"Summon an obedient demonic servant of Jashin and you will be granted a companion who will obey your every whim and endure any level of punishment thanks to their immortal body. This companion can be used freely for any service around your residence, including sex, but remember to feed your companion regularly as to avoid any risk of starvation. Lord Jashin will hand-pick your companion in exchange for barely an ounce of your blood to start the ritual (terms and conditions apply)."

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Kakuzu summons a demon companion, but ends up with a prickly and unruly succubus - Hidan. What happens next will warm your heart and milk Kakuzu dry ♡

Notes:

The curse almost got to me since this was initially written in January but has been stuck in editing hell till now, thank you @NatsBats for helping me get this thing in shape! And big thank the Aries season for giving me the manic energy (focusing on this thing for 8 hours straight and editing it in one go) I needed to get the final editing ironed out 💪!

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

Work Text:

***

 

Like most unexpected encounters in life, this also began with too much red wine on a lonely Friday night.

 

Kakuzu, a bit of a recluse, preferred solitary hobbies like reading. His unjust imprisonment, where he had only books for company and no desire to make friends, only exacerbated his antisocial tendencies. After his release, he joined the Akatsuki, a shady organization that conducted most of its business discreetly, which he could appreciate. With his proficiency in accounting and intimidating appearance, Kakuzu was an ideal fit for his new role as a loan shark. His day's work was finished, and the weekend was quickly approaching; the body bags were sent where they needed to go, and all deductions and payroll documents were finalized. Kakuzu hurried to finish his freshly microwaved dinner while sipping on the finest boxed wine he could find. He couldn't help but steal glances at the paper bag sitting on the counter, knowing it held a new addition to his personal “library,” which was really just a few tightly packed shelves.

 

It was almost as if the book had found him and not the other way around. He had been drawn to it from the moment he laid eyes on it. 

 

It happened after Kakuzu loaned a petty amount to some idiot priest attempting to restore the temple's roofing. Even by his standards, the loan interest Kakuzu settled him with was disgusting. That seemingly small loan would balloon into a massive sum in a matter of weeks. These religious people were easy to trick—something about trusting people's goodwill. He was heading down the steps when he noticed something lying at the base of the temple's statue, some deity of life and death. It looked nothing like the religious garbage pushed by the peddlers outside. Those books were usually loaded with inspirational quotes about love, joy, and other bullshit, paired with images of clouds and light. He considered picking up random junk off the street, but this book appeared to be intriguing and expensive. So Kakuzu reluctantly picked it up.

 

Dishes put away, he reached into the bag and pulled out a vintage-looking book with a smooth black cover and a heavy-set leather belt. His fingertips trailed across the binding, checking for any damage. Even though the leather might have been old, it looked smooth and only had a few cracks. A red pentagram, a triangle within a circle, was inscribed; although the ink seemed faded, the red must have been vivid when the book was first printed. He unlocked the side belt and opened the tome with care.

 

Opening a book that he knew nothing about felt like a treat. Kakuzu flipped the pages wide-eyed like a child, opening the biggest birthday gift from the pile—not that he had ever experienced piles of gifts in his childhood. 

 

It was some sort of mythology book, and as he turned the pages, Kakuzu couldn't help but notice how fragile and faded they were. Despite being written in modern English, the book's appearance made it feel like it belonged to a past century.

 

There was a lot of esoteric nonsense, including violent dogmas, commandments, written instructions for blood rituals, body alchemy, and potions and tinctures. He sipped his wine and flipped through the book, finding it amusing. The nameless author's sick imagination was evident throughout the book. The list of bizarre contents was seemingly endless, ranging from demonic stamina potions to hexes for becoming a live voodoo doll and even a recipe for a potion that could mend perforated organs. To top it off, there was even a recipe for some sort of demonic poppers. 

 

That's when he came upon something intriguing in the demonology section: "How to Summon Jashin's Demonic Companion."

 

He leaned forward, gaze following the text's lines.

 

"Call forth an obedient demonic servant of Jashin to do your bidding. Jashin himself will hand-pick your companion in exchange for barely an ounce of your blood (some conditions apply). Your companion can withstand any punishment without dying and may be freely handled for sex or any other service you require around your residence. Remember to feed your companion regularly since starvation can be fatal."

 

Kakuzu's somewhat intoxicated brain considered the notion. An ounce of blood was a low price; he shed more blood at work and wasn't paid much for it.

 

Exhaling deeply, Kakuzu swirled the wine in his glass, taking in its deep, oaky aroma. Despite being cheap, the wine had the attributes associated with an expensive winery, which was slightly concerning. But he knew that the better things in life could, at times, be found for a low price; you just need to know where to look.

 

The word "companion" felt as foreign as the concept it represented. Despite denying any romantic tendencies, he longed for something lasting, even if his needs were a bit unusual. 

 

Even though he felt bad about wanting to hurt others for pleasure, he knew some would like him to do it. Worse, he was never pleased with the results of vanilla hookups or pick-up play with total strangers because he always wanted more. He almost hoped that this fairy tale nonsense was real.

 

He finished his glass while reading the summoning instructions.

 

  1. On a night when the red moon shines, spill blood from your palm.
  2. Draw Jashin's third pentagram using your blood (See page 66, Fig.6 for a reference).
  3. Once the preparations are complete, pray for Lord Jashin to provide you with "The one companion chosen for me, and me alone." (Repeat three times.)
  4. Read the spell on page 69.
  5. Remember, Lord Jashin will pass his unholy judgment and provide you with a companion according to your needs for all eternity. (See conditions on page 33)

 

Only four steps seemed easy enough. But wasn't the blood moon a rare occurrence? He could swear he saw something on the internet about it happening this weekend. 

 

Standing up, Kakuzu held the book and opened the curtain to his living room's wide window. The moon shone just outside, almost as if it were only a mile away, bathing the city in its bright shine and the crimson glow everyone was raving about. From his vantage point, he could see a group of people gathered on the roof next door, using telescopes to take pictures.

 

As he looked out, Kakuzu felt his heart race in his chest, the thrill of the moment capturing him completely.

 

His body moved on its own, flipping over the pages in preparation for the ritual; there was no time to read the conditions. That’s when Kakuzu stopped in his tracks; his thoughts became conflicted.

 

"What the fuck are you doing?" questioned the rational side of his brain.

 

"It's Friday night, and I had a few glasses of wine - so I deserve to do something moronic," chimed in the side of him he wasn't proud of at times.

 

With a shrug, Kakuzu gave in to the stupidity of it all, not bothering to give it as much thought as he probably should have.

Anticipating the hassle of cleaning up the blood, Kakuzu spread a few newspapers on the floor. He then proceeded to slit the back of his palm and draw pentagram #3, which happened to be the same as the one on the book cover: a triangle within a circle.

 

His blood took on an odd paint-like quality when he drew the pentagram with his foot. He attributed the strangeness of it to the alcohol in his system.

 

The next step was that cringeworthy chant. 

 

"Lord Jashin, send me the one companion who is meant for me, and me alone," Kakuzu mumbled thrice, his frown growing with each iteration, feeling foolish as he spoke to an empty room.

 

With the spell complete, the pentagram drawn on the floor began to emit a bright red glow. Kakuzu's eyes widened as he watched, transfixed.

 

He listened in horror as whispers emerged from the glowing pentagram, at first indiscernible but gradually growing louder and more ominous with each drop of blood.

 

Kakuzu couldn't make anything out; they emerged as distorted wails and hushed whispers in an otherworldly tongue. But as more of his blood fell, the murmurs turned into coherent phrases, and the voice grew quiet but ominous.

 

He stood there, his heart pounding, wondering what was about to happen.

 

"I have the one for you. Just for you, wicked one."

 

A shiver ran down Kakuzu's spine. He had faced off against groups of goons from rival gangs and came out half-dead but fine, yet this... His thoughts slowed to a crawl, and he stood frozen as if his blood had stopped flowing. Then, the menacing voice returned.

 

"Through your blood, we are connected, and I know every evil desire you harbour."

 

"Who the hell are you?"

 

A chill ran down his spine as he heard the bone-chilling cackle in response - the kind of sound that makes one's blood run cold and hair stand on end—and he knew that it was the most sinister thing he had ever heard in his life.

 

"You know who I am, now I'm expecting your answer; do you wish to accept my offer?"

 

The book in Kakuzu's hand turned pages until the force controlling it landed on the page with the final spell. The ominous red glow seeping through the ink filled him with unease. He had read enough stories about doing business with the Devil, and there was always fine print in the contract. He hesitated.

 

"Is my blood all you need from me?" Kakuzu asked, wary.

 

"Hmm, yes, I require your blood and any other life force…substance that binds souls together."

 

Was that—something about souls being bound together?

 

"You want my soul in exchange, don't you? That'll cost you," Kakuzu stated firmly. 

 

There was a long pause.

 

"Mortal, are you trying to haggle with the Devil?"  the Devil chided, his voice dripping with malice and amusement.

 

"My soul is worth more than just some house servant, so pay up, or I throw this thing out." Kakuzu felt his confidence return to him as soon as their conversation turned into a negotiation.

 

"Well, I've had a fifth of your soul for a long time now, so why not?" The Devil carefully deliberated, weighing his options, "If money is what you seek, I can solve all your financial issues—I will make you rich."

 

"Now we are getting somewhere." Kakuzu hummed in agreement.

 

The Devil continued, "And in exchange, I’ll give you my beloved servant."

 

Kakuzu nodded, "I believe our negotiations are settled."

 

***

 

Kakuzu hastily recited the final spell, and the room descended into darkness. The low whispers surrounding him grew louder and more powerful as he spoke the words. But as soon as he finished the last line, it was as if all the mystical air had vanished into thin air, along with the murmurs and the eerie glowing light. The room returned to its previous state of peace and quiet. He surveyed his surroundings in a state of mystified bewilderment. The cut on his palm had apparently healed on its own, and the furniture was still in its original spot. 

 

Really, nothing seemed out of place except for-

 

He had to blink twice to believe it, but there was a half-naked man in his living room. As the creature wandered around the room, seemingly oblivious to Kakuzu's presence, he took the opportunity to study him more closely.

 

By society's standards, the man was tall but a little shorter than Kakuzu. He was fit and athletic and wore a curious set of latex and leather, including a harness, stockings, gloves, and a collar. His toned stomach displayed a strange pentagram tattoo, the same one Kakuzu had drawn not too long ago. But it was the pair of wings and horns protruding from his head that truly startled Kakuzu.

 

And his immaculate face had captivated him. Light eyelashes and platinum hair slicked back; deep purple eyes that resembled something sweet, sticky, and artificial. He had a pale complexion, contrasting with Kakuzu's bronze skin. If it weren't for his black horns and a heart-tip tail flicking below, Kakuzu would say he looked somewhat angelic, despite being clearly demonic in nature. The creature's strange eyes widened in surprise as he realized someone else was in the room. 

That contrast between his threatening appearance and apparent helplessness piqued Kakuzu’s interest. But as soon as the man spoke, Kakuzu's initial fascination dissipated.

 

"Where the fuck am I?" said the man in a grating and obnoxious voice. The demon drew his "r" s in the same manner as lowly underlings in criminal families, desperately trying to fit in. 

 

"My home?" Kakuzu answered in a monotone.

 

The demon snarled, crossing his gloved arms over his chest and lashing his tail against the hardwood floors. "Haha, very funny, genius. Do you have any idea how annoying this is for me, human? I was torturing heathens, and then Jashin sent me to Earth without explaining anything. Once again, where am I!?"

 

"I already told you—my home. I summoned you using this book," Kakuzu winced, regret over the deal creeping into his mind.

 

The demon's jaw went slack for a split second, his gaze darting between Kakuzu and the book. Then something must have clicked because he began swearing under his breath before grabbing at his stomach, where a pentagram mark was tattooed.

 

"Fuck, fuck, fuck, is this why I'm so hungry?! And that thing inside me...aw man, this fucking sucks!" 

 

"If you're so hungry, I have some food." At that moment, Kakuzu would have done anything to get this creature to quit being so damn noisy.

 

But it didn't help at all—quite the opposite.

 

"What the fuck are you talking about!? I'm a succubus; I feed on sex and life force, not human food, you idiot!" The demon's voice grew shrill, and he laughed like a maniac. "Oh, this is so pathetic! You have no idea what you're doing, and now I'm bound to you!" An irritated groan came in place of the laughter. The demon in front of him clutched his hair, fidgeting and muttering to himself as if he wanted to break free from invisible chains.

 

Kakuzu stood there in shock as the demon cycled through five different emotions in a span of seconds. It was comical and scary at the same time.

 

"Will you knock it off? Everything's fine." 

 

It really wasn't. Still, Kakuzu resorted to the firm and steady tone of voice he typically reserved for when someone he was extorting became hysterical. And he was becoming increasingly aware of how much he felt like he was the one being extorted right now.

The succubus may have been prone to switching between calm and unhinged, but Kakuzu's tone seemed to do the trick. The demon stopped as if on command. Wide, purple eyes looked straight at Kakuzu. 

 

Something about his gaze put a strange sense of ease into Kakuzu. Could this work?

 

Kakuzu's mind raced as he processed the situation. So this was what the book had really meant - summoning a succubus. Jashin had tricked him, and now "feeding" the demon would mean having sex with him. Kakuzu didn't mind, though. The demon was undeniably attractive, with a pretty face and a lovely body. But holy shit, did he have to be so fucking annoying?

 

"Do you have a name, demon?"

 

The creature untangled himself, standing with his hands on his hips and chest out, his earlier tantrum forgotten like it never happened.

 

"I am called Hidan. I am the most devoted succubus Jashin could ever hope to have!" Hidan's words flowed out of him like an endless stream of consciousness. "Jashin is incredible; he runs our part of hell so well! And just so you know, I am his favourite. He's never said that, yet he lets me do most of the torturing, which means he trusts me. That's why it has been so long since I last visited Earth. I am far too valuable—"

 

Kakuzu could feel a searing migraine creeping up on him as Hidan's never-ending rambling continued. He was a quiet and intimidating person, and his scars and tattoos made it rare for people to engage him in lengthy conversations. So, the succubus's sheer audacity to blabber on caught him off guard.

 

"Do you ever shut up?" Kakuzu spat, his infamous temper bubbling within him. 

 

He couldn't help but wonder if there was a reason why the Devil had given him such a troublesome demon. Maybe there wasn't. Perhaps this was a mistake. 

 

Is it possible to get a refund from the Devil?

 

"Don't fucking interrupt me, mortal!" Hidan's eyes narrowed dangerously as he gritted his teeth. The demon drew a conveniently placed knife from the kitchen counter. "I'm going to kill you, I swear—"

 

As the demon charged at him, Kakuzu was fully prepared, even eager, to punch his lights out. But suddenly, Hidan stopped mid-swing, howling in agony as he clutched the mark on his collarbone bearing Kakuzu's name. The demon dropped his knife and looked at the mark in fear and confusion. "Hey, what the fuck!?"

 

Kakuzu grinned as he quickly put two and two together.

 

"It looks like it prevents you from killing your Master. How did you not know that?"

 

"Hey, shut up! I know exactly what this is. In any case…" Hidan touched the mark, tracing his fingers on the kanji. "Who is this Kaku... Zu? Kakuzu? Who is that?"

 

"That's my name, dumbass." 

 

"...I knew that too," Hidan said nonchalantly, crossing his arms over his chest as if he hadn't just tried to kill Kakuzu. But then he suddenly realized something. "-Wait! Did you just call me dumb?"

 

Kakuzu groaned and rubbed the bridge of his nose. Surely, he wasn't the problem. The succubus must have been defective.

 

"Sure you knew. Besides, shouldn't succubi be more submissive and obedient? What's the matter with you? Did they send me an imp?"

 

"Fuck you! You're such a jerk!" The demon glared at him, visibly offended at Kakuzu's audacity. Hidan's eyes flashed with an emotion Kakuzu was all too familiar with; hurt.

 

"Is that so? I was merely telling the truth."

 

"Submissive and obedient, huh? You must be delusional if you think I'll grovel at your feet. I've already told you that I'm Jashin's favourite. You stupid old pervert—"

 

Before he could ramble on any farther, Kakuzu grabbed Hidan by the throat and pinned him to the nearest wall.

 

Kakuzu's frustration and anger boiled over as he spoke, his hand pressing down on Hidan's throat. "I've had enough of this. You're going back, and I'll be getting my refund, whether you like it or not." He squeezed tighter and tighter. His work habit took over, and he squeezed his grip with the intent to kill.

 

But then something strange happened. Kakuzu anticipated the demon to struggle, get angry, or do anything a normal being would do while choke-slammed into a wall. Instead, what he got was a moan that could rival any messed-up porn that brought nothing but shame after you were done getting off. The sound was wanton, whorish, and reeking of need.

 

Kakuzu's eyebrows shot up. The shock of the situation made him loosen his grip, and a trembling gloved hand pressed on his palm—a silent plea to add more pressure.

 

"Are you... actually enjoying this?" he asked in disbelief.

 

Hidan shuddered and nodded eagerly, even though he was pinned to the wall. Kakuzu could see the demon's tail wagging below him in excitement.

 

Testing, Kakuzu raised his knee, pressing hard between the demon’s legs. Hidan laughed, his voice far too giddy given how painful it must have been to have a knee push on his dick like this.

 

"Is this all you got?" His voice was hoarse, not unlike Jashin's, but instead of instilling fear, it just made Kakuzu feel deranged.

 

Despite his seeming search for a passive submissive, Kakuzu secretly enjoyed the challenge of breaking down someone with more fight in them—a person you can turn into a trembling mess of and feel justified in doing so. Hidan had an inclination that complemented his. They can make it work.

 

"...So, Hidan," Kakuzu's voice was low and steady, and the demon's eyes widened at the usage of his name, "you feed on sex, right?"

 

"Yeah…"

 

"And are you hungry now?" Kakuzu whispered.

 

Hidan's eyes turned into little magenta hearts as they sparkled with lust. He grinned, revealing his sharp fangs. "Yes!" he exclaimed.

 

"Good."

 

Kakuzu released his grip on Hidan's neck, disregarding the demon's puppy eyes at the loss of touch. Instead, he grabbed onto Hidan's pale, stocking-clad hips and lifted him to face level. Hidan yelped in surprise as his tiny wings were crushed up against the wall, but his cry was cut short by Kakuzu's lips on his. The succubus was as heavy as Kakuzu anticipated, but it was nothing he couldn't handle. 

 

Despite his violent demeanour, Hidan's lips were soft, warm, and inviting. He kissed Kakuzu back eagerly, deepening the kiss and thrusting his tongue into Kakuzu's mouth with fervour. Hidan's gloved hands tousled Kakuzu's long hair while he wrapped his legs around his back, pulling Kakuzu closer. As the kiss grew rough and messy, there was no mistaking it; Hidan was trying to bite him with those sharp teeth of his. Kakuzu tried to avoid nicking himself, but soon he could taste an all-too-familiar metallic taste in his mouth. Hidan sucked the blood from Kakuzu's lips zealously, licking it from the edges of Kakuzu's suture scars.

 

"Tastes so good!" Hidan's eyes narrowed into a thin, pleased line, no doubt feeding on Kakuzu's blood as if it were a light appetizer before the main entrée.

 

Kakuzu didn't know how to respond to that. He had no idea how kissing alone had made him so painfully hard in the first place. Hidan's saliva must have had an aphrodisiac effect on him since, all of a sudden, he felt like an insanely horny twenty-year-old, and his mind was struggling to catch up.

 

Hidan merely laughed and pushed his hips against Kakuzu's. Growing increasingly impatient with his movements, he moaned into his mouth as he licked and nipped at his lips, not letting any blood go to waste. 

 

"More..." Hidan pleaded. His aggravating voice was suddenly enticing, like an angel's prayer.

 

Kakuzu responded with a low hum, his hand returning to cradle Hidan's neck as his thumb ran lovingly over the mark bearing his name. The contrast between his dark hands and the delicate pale flesh of the demon's neck was striking. Kakuzu shifted his pelvis, pressing their clothed erections together and pushing the succubus harder against the wall. 

 

Hidan arched forward to meet him, gloved hands trembling on Kakuzu's shoulders as his airflow was again restricted. When Kakuzu gave him a particularly rough press of his hips paired with his fingers squeezing tighter against his windpipe, the demon's eyes rolled back. The succubus made a strange, high-pitched noise that seemed to be aimed directly at Kakuzu's heart. The tension of his arousal rose as he watched in amazement as the succubus smiled in pure delight, all while Kakuzu crushed him against the wall, almost breaking him. 

 

He almost felt wrong about how hot it was to watch the demon like this. Hidan’s eyes rolled back at the lack of air, his tongue wet and glistening, drool dripping from his mouth as he struggled to breathe. 

 

Kakuzu’s fingernails dug possessively into the firm curve of his ass. "You're so much more attractive when you're not spewing nonsense," he purred, have to give credit where it was due. 

 

Hidan's eyes widened, and he gave out a raspy whimper as his entire body tensed at the other man's words. But the tension melted away into a full-body shudder. Kakuzu breathed out a low chuckle and released his neck. Being a succubus, he seemed to have heightened sensitivity to pleasure and pain.

 

As Kakuzu lowered Hidan to a standing position, the demon's face pressed against his chest, and his gloved hands tightly clutched at his shirt, catching Kakuzu completely off-guard. The pair of horns came dangerously close to ramming into his face as well, but that he dodged.

 

Kakuzu was overcome by a strange impulse, and he cautiously ran his fingers through Hidan's silver hair as if petting a cat that could bite his hand off. The hair felt soft and well-cared for, like silk against his rough palms. He also noticed that Hidan's smell was strangely comforting. It reminded him of the early weeks of April's cherry blossom season. Kakuzu left his hand on Hidan's head while the succubus regained his breath.

 

"I'm still hungry," came a muffled voice from where Hidan held his head buried in his chest. 

 

Kakuzu snorted, which caused the succubus to glare up at him with a pouty, red face.  

 

"What?! I know you're still hard! Don't give me that!"

 

"Since you want it that bad, grovel at my feet and beg for it." Kakuzu's smile reached his eyes; he was surprised to feel the tug of the scars on his skin; it's been a while. 

 

Hidan glared at him harder, his red face contorting into a scowl as he spat out his words. "Are you fucking serious?"

 

"I mean, I could simply let you starve to death. Wouldn't your Lord Jashin be upset if you didn't do your duty as a succubus?" 

 

Hidan squared his shoulders, yet his eyes showed an undeniable hint of anxiety.

 

"Man, you are one fucked up human, Kakuzu. You'd have made an excellent demon. Seriously." Hidan groaned in defeat.

 

"Yeah, I think I'll do just fine in hell." 

 

"Oh, I'm sure," Hidan swore under his breath, taking a small step back to compose himself. He awkwardly lowered himself to his knees, trying his best to avoid eye contact with Kakuzu, before mumbling, "Just...let me suck your dick already."

 

Kakuzu gave him a look .

 

Hidan scowled hesitantly, "I want your old dick, please, Master Kakuzu," he tried again, struggling to say something he deemed beneath him, his voice shaking.

 

"I don't like being addressed as Master. And I know you can do better than that." Kakuzu took Hidan's chin in his hand, forcing him to look him in the eye.

 

Hidan's face twisted in a wide range of emotions as he gritted his teeth, yet his gaze kept hungrily wandering off to Kakuzu's crotch. 

 

"Please, Kakuzuuu, I'm really good at sucking dick." He fumbled over his words, a blush growing over his cheeks. "I swear, I'll swallow every last drop. I'm serious!"

 

Pausing as if considering the offer, Kakuzu tenderly stroked his chin. His eyes narrowed as he took in Hidan's expectant expression, noting how his gaze never wavered from his face. He felt a sense of satisfaction at the way Hidan was waiting for his approval, as if nothing else mattered. The way Hidan's eyes followed his every movement, the way his lips parted slightly in anticipation, it was intoxicating.



"Show me." Finally, Kakuzu spoke.

 

Hidan beamed and nodded so hard that Kakuzu feared for his neck. And that smug grin was really starting to grow on him. 

 

Kakuzu remained still as the succubus hurriedly unzipped his pants and buried his face into his crotch, inhaling deeply. The warm breath spread a shiver over Kakuzu's body as the succubus began mouthing at the clothed outline of his cock, for once his sharp teeth only carefully grazing him. His teasing didn't drag on for too long; when the succubus decided Kakuzu had enough, he impatiently pulled down Kakuzu's underwear, exposing his long, dark, veiny cock. Kakuzu exhaled as the sensation of relief washed over him.

 

"Oh man, I'm so lucky!" Hidan licked his lips as his gloved hands explored Kakuzu's large dick. His pupils turned into that weird heart shape again. "You're even hung like a demon."

 

His words caused a deep blush to creep onto Kakuzu's face, and his cock twitched in the demon's hold, startled by the smoothness of latex sliding against his sensitive flesh.

 

Hidan's eyes narrowed, and he chuckled, relishing at the effect he had on him. 

 

With a mischievous glint in his eyes, the succubus kissed his cock and stuck his tongue out to lick the pre-cum trickling from the tip. He gave his cockhead some much-needed affection, sucking on it with his delicate lips as if it were a treat made just for him. Hidan didn't waste much time before sliding his tongue down the thick vein of Kakuzu's shaft. He dipped his mouth to lick and suck around the base before sinking lower and taking Kakuzu's balls into his mouth. 

 

Kakuzu, who managed to remain stoic this whole time, groaned in surprise. His balls weren't all that sensitive, but something about this strange, ethereal-looking creature on his knees doing something so filthy to him so casually hit him hard.

 

One at a time, Hidan gently massaged the sensitive flesh with his tongue while stroking up and down his cock. And with how Hidan sighed and moaned, he appeared to be enjoying himself.

 

"Has it been that long for you, Kakuzu? No wonder you're such a grouch." Hidan murmured as he licked his way up along the underside. His warm mouth pressed slow, slick kisses to his dick.

 

Kakuzu quirked an eyebrow. Was he fucking measuring his load?

 

"Well, more for me." Hidan exhaled before taking hold of him and  wrapping his lips around the cockhead, sucking him while minding his teeth. The demon's mouth enveloped his cock with loving care, swallowing him into the velvety warmth. 

 

Kakuzu nearly doubled over with a sudden jolt. His hands needed something to cling onto; he spotted a pair of ram-like demon horns on Hidan's head. Kakuzu grabbed them, his fingers digging into the rigid, bone-like structure as he pulled Hidan towards him. He felt a satisfying surge of control as he held him like this and forced his cock deeper and down Hidan's throat.

 

Hidan sputtered briefly, groaning at the sudden increase in pressure. Kakuzu was momentarily considering pulling back when their eyes locked.

 

Kakuzu searched for any sign of discomfort on his face, but all he found were eyes filled with pleasure and an eyebrow cocked in a mocking challenge. Wet, saliva-stained lips curled around Kakuzu's dick - in a devilish smile that sent shivers down his spine. As if sensing his hesitation, he gave Kakuzu an encouraging tap on his hip, urging him to keep going.

 

Impressive brat, Kakuzu thought and chuckled darkly.

 

He regained his focus as he began thrusting in and out of his mouth, using him like a toy. Hidan's jaw relaxed, and his eyes rolled back as he surrendered his mouth to him. Kakuzu watched, enthralled, as the demon's throat accommodated him with alarming ease—zero gag reflex. Hidan took a deep breath through his nose. He was calm and focused, his nose pressing against Kakuzu's toned stomach on each pull. 

 

No ordinary human can sit there with so much dick down their throat and look so blissed out. Kakuzu clenched his jaw. There was no fucking way he was going to last.

 

Something predatory flashed in Hidan's eyes as he suddenly became more active. He sucked hard, gently bobbing his head, even with the grasp Kakuzu had on his horns. Hidan made a sound deep in his throat, the vibration leaving Kakuzu groaning. 

 

"Holy shit," Kakuzu mumbled abruptly. Attempting to maintain a semblance of control even though he knew he was about to cum any moment; not even his age or stamina could save him. This succubus pulling out every dirty trick was not helping either.

 

Kakuzu was so focused on the attractive face fixed on him with a mouth full of dick that he didn't notice a gloved hand sliding away from his hip. 

 

A sudden pressure on Kakuzu's perineum caught him off guard. Hidan's gloved hand traced a pattern up his taint as if searching for something specific. Kakuzu's body shuddered with pleasure as he felt the pressure on a sensitive spot he didn't even know existed. Hidan's touch was expert, hitting just the right amount of pressure to bring Kakuzu from hard to painfully hard in seconds.

 

Kakuzu let out an undignified moan as his knees buckled. Thankfully, Hidan steadied him just in time. He came harder than he's ever had in all his 41 years, coating Hidan's throat in pulses of cum. The succubus's silvery eyelashes fluttered closed as he held Kakuzu deep in his mouth and swallowed hard around him, gently caressing Kakuzu's balls to coax more out of him. 

 

After what seemed like the longest orgasm of his life subsided, Hidan slowly pulled off his cock, gently milking him for any "leftovers" and diligently cleaning him up with his tongue. Despite the saliva on his chin and his neat, sleek hair becoming messed up, he looked positively radiant and content. The strange pentagram on his stomach flashed a faint red light as his gloved hand stroked his belly.

 

Breathless, Kakuzu collapsed onto the floor beside Hidan. He realized he had been wrong. There was no way he could send such a creature back. Kakuzu looked at Hidan in bewilderment and was again met with that stupid, smug grin.

 

"See, I told you I was good." Hidan winked at Kakuzu, leaning in to give him a playful bite.

 

Kakuzu was never the type to kiss someone after they just had his dick in their mouth. He was more of a tuck-in-and-go kind of guy. But now he was wondering what made this creature so damn happy. He reached for the demon's face without thinking, grabbed his wet chin, and drew him in for a messy, hungry kiss. 

 

He wasn't sure about his taste, but when it was mixed with Hidan's saliva, he suspected there was something to it.

 

Hidan giggled, his body nearly vibrating with excitement. "You taste so good. I want more!"

 

"Are you just constantly hungry?" Kakuzu asked, frowning.

 

"Lord Jashin told me that's because I starved to death in my previous life or something," Hidan laughed dismissively as his content expression turned sombre for a fleeting moment. But the demon quickly bounced back from whatever thoughts this had provoked. 

 

Kakuzu took a moment to process what he had just been told. He struggled to find the right words to comfort him.

 

"Aw man, you are thinking too hard. Stop that." Hidan's hand came to rest on his hip, and he gave it a gentle squeeze. "Hey, I know you've got at least two more in you, old man. Where's your bedroom?"

 

Kakuzu blinked; the succubus was right. He was getting hard again; how someone his age could do this, he didn't know; everything about this evening felt like a fever dream. 

 

He was ready to get off the floor when Hidan grabbed him.

 

"Wait! Can you...carry me again? That was so cool."

 

Somewhat touched, but mostly impatient, he reached out to grab Hidan. Though his legs still trembled slightly from earlier, he managed to hoist him up with ease. Hidan's face lit up with a wide grin as he eagerly wrapped his arms around Kakuzu's neck, pulling him closer.

 

"Before I met you, I had no idea a human could lift me like that!" Hidan exclaimed.

 

Kakuzu hummed nonchalantly. "It's not much of a problem. You get used to it when you make your living hauling corpses."

 

As soon as the words left his mouth, Kakuzu silently chastised himself. He was paid to keep his mouth shut, yet here he was, telling this man - no, demon - about things that could get him sent back to jail. Hidan didn't seem the type to go and snitch on him to the dogs, but still.

 

Hidan fixed his gaze on Kakuzu for a moment, then erupted into uncontrollable laughter, kicking his feet up into the air with glee.

 

 "Oh, so you are a demon in disguise, after all!" 

 

Maybe it was the aphrodisiac in his saliva, maybe he was starting to lose his sanity, but Kakuzu found the sound of his laughter comforting, full of energy and the exuberance of youth. When was the last time he laughed so wholeheartedly at something? Even more so, it put him at ease that his shop talk about keeping fit by lugging dead bodies to septic tanks was treated as though he had told mundane office gossip about two coworkers hooking up.

 

"Unlike a demon, I don't make much of a mess. The cleaners are expensive these days," Kakuzu watched Hidan's lips curl into a smile at another dry joke. His strange, purple eyes never seemed to leave him.

 

"Hmm, where's the fun in a massacre without a little mess?"

 

"I make my money based on the corpse being recognizable, so I can't really afford to make a mess," Kakuzu laughed, the sound coming from deep within his chest.

 

"You know, Kakuzu, money can't hug you back, no matter how tightly you hold onto it," Hidan regarded him with a mysterious smile. There was something delicate about it that startled him. 

 

"Whatever you say." Kakuzu shook his head and shifted his hold on the succubus to unlock the bedroom door. He certainly wasn't going to take the preachy advice from a sex demon. Demons have no concept of how money works. It would be irrational to expect them to understand or care.



"Oh wow! It's kind of soulless here, huh?" Hidan's head darted around, taking in his surroundings, his horns nearly hitting Kakuzu in the nose.

 

Kakuzu simply hummed, a dismissive sound being his only reply. He had never been one for decorating. To him, it was a waste of time and money. He preferred minimalism, keeping things hidden away in drawers and cabinets. The only thing that broke the monotony of the empty room was the bookshelf, which held his personal favourites. It was the main centrepiece in the room while his weapons and other equipment were safely stashed under the bed.

 

As Hidan leapt out of Kakuzu's arms to look around, Kakuzu couldn't help but appreciate the sight of his muscular shoulders and toned back, accentuated by his jockstrap. His gaze drifted down to Hidan's adorable black tail with a heart-shaped tip, swaying back and forth as he examined the bookshelf. Kakuzu's attention was suddenly drawn to something catching the light—was that a gemstone nestled between Hidan's cheeks?

 

Hidan was saying something, but all Kakuzu could do was stare longingly at what he recognized as the wide base of a buttplug with a bright red gemstone. How did he fail to notice it while holding Hidan? His mouth watered. This was rather enticing. He approached Hidan, his gaze fixed on the shiny jewel.

 

"Hey, are you even listening–" Hidan didn't get to finish his sentence as Kakuzu's arm pushed on his shoulder, forcing him against the shelf.

 

"What do we have here?" Kakuzu held him with one arm and used his free hand to spread Hidan's ass to take a closer look. 

 

The thing looked pretty, the silver metal complementing the pink rim of Hidan's hole stretching around it. He gripped the base, moving it out slowly but with intent.

 

"A-ah, it's—" Hidan stammered.

 

"What, can't talk all of a sudden?" Kakuzu teased while pushing the plug's base at a downward angle. 

 

"Fuck…! It's a gift from ah—  Lord…Jashin."

 

"Hmm, seems like that devil of yours might have some use after all," he remarked dryly, his lips curling into a smirk.

 

"Hey, don't talk about Lord Jashin like that, you asshole- Ah!" Hidan's eyes widened as Kakuzu pushed the plug sharply into his prostate.

 

"Well, if you insist."

 

Kakuzu first experimented with the plug's base, pressing and pulling, gently fucking him. He spread his ass with his thumb to watch his rim stretch over the toy's wider parts. The plug was quite large, almost his size. Really, it was pretty thoughtful that the preparation was done for him in advance. 

 

Hidan quietly whimpered at the ministrations, his knees wobbling as his hips rocked in time with Kakuzu's hand movements. When the rhythm became more erratic, the only thing that kept him stable was Kakuzu's hand forcing him into the shelf.

 

Hidan turned his head to look back at Kakuzu, "Just fuck me already," a gasp escaped from his lips. His face flushed with a mix of anger and desperation that somehow managed to be almost adorable at the same time. His pale eyebrows trembled with emotion, and his gaze held a hint of defiance despite the vulnerability that shone through.

 

Satisfied with the state he got the succubus in, Kakuzu stepped aside and pulled the metallic plug out with a wet pop. Hidan groaned at the sudden emptiness, breathing out in relief. 

 

He took in the way Hidan's hole squeezed around nothing. While he really wanted to fuck his brains out as soon as possible, his ass just looked so appetizing. Nicest gape he'd ever seen—pink and, again, almost delicate. Maybe it was the fact that his ass was smooth and hairless or something else about Hidan that made Kakuzu want to worship him. 

 

Kakuzu put the plug on the shelf, mentally checking that it wasn't next to anything important. It seemed appropriate to put it beside sacrilegious French novels.

 

He leaned against Hidan's back, the wings folding in to allow him to get closer. Kakuzu kissed the nape of his neck and breathed in the scent of Hidan's soft hair. He kissed and sucked tiny marks onto the parts of his throat that the collar wasn't covering. Hidan's neck must have been especially sensitive because his breath faltered with every lingering bite Kakuzu gave him. Hidan's muscles quivered as Kakuzu's rough hands explored his toned body. 

 

Slowly, he worked his way down his shoulders, kissing the area where the wings began on his back all the way down to his waistline, marvelling at how clear, smooth, and warm his skin felt. He dropped down to his knees, squeezing and spreading Hidan's ass. He grinned before kissing around Hidan's hole, taking advantage of the demon's blissed-out state.

 

"Aah! What are you—" With a nervous, almost shrill yelp, Hidan instinctively tried to close his hips.

 

Kakuzu couldn't help his coy smile, licking the hole and sliding his tongue over it to make it nice and wet and to get him to open up. Hidan gasped, involuntarily buckling away from the intense pleasure, nearly knocking over several books on the shelf he clutched.

 

"Watch the books," Kakuzu growled, his hands grabbing Hidan by the hips, digging his fingernails into the fleshy meat of his hips.

 

"Dirty old man," Hidan keened through his teeth but stilled himself.

 

 

Kakuzu spared him the response because his attention was drawn to more important things as he lapped indulgently over the now-relaxed hole. Hidan was pliant and tight at the same time as he pushed the tip of his broad tongue into him. And he was so fucking sensitive, moaning like a bitch in heat every time the muscle entered him. 

 

The demon's taste was unexpected, perhaps even sweet. The more he tasted him, the more he felt like a warm fog was descending upon his thoughts. It was as if the demon's saliva and lube contained some type of aphrodisiac, making him wonder what other abilities the demon possessed.

 

Hidan's whimpering and babbling grew increasingly unintelligible as Kakuzu became more engrossed in eating his ass. The succubus's dick was regrettably dripping pre-cum all over the freshly cleaned carpet. While Kakuzu was forcing Hidan's legs to stay still, he was paying back the succubus for having done the same for him, plus it felt quite nice to massage his hands over the smooth latex, 

 

"S-stop! I'm going to cum like this, I-" As his leg muscles tensed, Hidan's voice cracked.

 

Kakuzu either took pity on him, or his patience was wearing thin. All he could think about now was how much he wanted to shove his dick into that tight hole and fuck him nice and hard.

 

He stood up, grabbed hold of Hidan's jockstrap band, stretched it, and let it snap against the demon's bare skin, making a satisfying slapping sound.

 

"Hey, ow!" Hidan barked out a half-hearted yelp, but when Kakuzu palmed his ass, he reflexively leaned into the touch.

 

"You can handle it," Kakuzu teased him, taking him by the jockstrap and dragging the succubus toward his bed.

 

Hidan let out an exaggerated eye-roll but couldn't hide the smile that crept onto his lips as he allowed himself to be manhandled. 

 

When he settled onto the thin blankets and throws, he stretched his body out, luxuriating in the sensation of being able to lie down. With a contented sigh, he spread himself out across the modest queen-sized bed, reaching out to grab a pillow and clutching it to his face as he inhaled deeply. 

 

"Ah…I like your scent." Hidan exhaled, clutching the pillow tighter.

 

"And what does it smell like?" Kakuzu asked as he reached for a tissue to wipe his mouth.

 

"Like late summer," Hidan murmured, mostly to himself, into the pillow.

 

Kakuzu raised an eyebrow, wondering briefly while he undressed. It was a curious coincidence. Once he got onto the bed and positioned himself on top of Hidan, he gave the succubus a long, thoughtful look before responding, "That's interesting because I was born in August."

 

"I made a good guess, then, huh?" Hidan's eyes were gleaming with undeniable excitement, and the contrast between his bared, pointed teeth and the excited gleam in his eyes was striking.

 

"I suppose you did." Kakuzu leaned in to give him a chaste peck on his temple, breathing in against his skin. He drew near and pulled Hidan into another gentle kiss before deepening it into something more intimate and sensual, especially compared to how rough and rushed their first kiss was. Their lips practically melted, and Kakuzu felt a degree of familiarity and comfort he had missed despite never having felt it with anyone else before, not like this.

 

Kakuzu moved lower to nuzzle at Hidan's neck, and the succubus swore at him for how it tickled when he kissed there - a clear indication for Kakuzu to fixate more on this area, giving extra attention to his tender neck, biting and licking it. His hands moved to cup Hidan's muscular chest, thumbs sliding over the pierced nipples, toying with them, tugging and twisting while Hidan tried to hump his thigh frantically.

 

"Fuck me already..." Hidan whined, his horned head shifting from side to side as he tried to seek more touch, more attention—just more. 

 

"Such a needy brat," Kakuzu scolded him, but he spread Hidan's legs apart at the knees all the same. He was so fixated on this creature that he forgot about his own pleasure, even though he was usually a selfish lover. 

 

"Maybe if you actually 'fed' me, I wouldn't be so hungry right now." Hidan kept complaining, kicking at Kakuzu in frustration.

 

"I'll make sure you don't go hungry again," Kakuzu smirked as he rubbed the tip of his cock up and down his hole a few times. It was too easy to tease him. He couldn't remember having this much fun in a long time. He grabbed the offending stocking-clad ankles and pushed his knees wider to fit between them. 

 

Kakuzu could only smile as he gave himself a few strokes to return to full hardness while Hidan stared at him in rapt attention the whole time. After their kissing, drool glistened at the corners of his reddened lips. His purple eyes, saturated in uncontrollable hunger, never took their gaze off his dick as Kakuzu positioned himself over his entrance.

 

"You fucking better—Oh!" Kakuzu chose that exact moment to hush him and push himself inside. 

 

"Fuck, it's huge." Hidan gasped, his irises forming back into heart shapes. His demeanour shifted from pouty and uncooperative to drooling and cooing as Kakuzu fed him more of his length. As he was stretched out, his eyes were transfixed on the spot where their bodies joined, watching Kakuzu sink inside him.

 

"Fuck, it feels so good to be whole again…ah!" Hidan half-groaned and half-giggled from the fullness.

 

Hidan's body yielded to him with surprising ease despite being so tight. Kakuzu pushed himself all the way inside, pausing to breathe for a moment. He couldn't remember the last time he had fucked a hole this tight. Hidan's insides were squeezing him in all the right places, like warm silk wrapped around his length. Their bodies seemed to fit together like they were designed to do so.

 

He dropped his attention to the succubus beneath him. Hidan's eyes narrowed happily as he rolled his hips in lazy circles against Kakuzu's, who was now balls deep inside him. The demon's gloved hands clutched at the sheets as he tried to inch closer to him. A bead of sweat trickled down Kakuzu's temple; the fucker had a way of getting him riled up. He could feel his face heating up at the sight. He'd never had someone take his dick with such delight. Sure, he was big, but most people didn't look like they were on cloud nine whenever he fucked them. He assumed the scars were turning them off—or something else about him. Was this typical of demons? Or maybe Hidan was just starving and alone this whole time? His heart ached at the latter notion.

 

Strong latex-clad legs came to wrap around him, urging Kakuzu to mount him and move already. He was in no position to deny him that simple request. Kakuzu raised his hips and pushed inside him, thrusting long and slow at first to get into the rhythm. Savouring every delicious noise Hidan made.

 

He wanted to drink in the sight of this devilishly attractive man impaled on his cock. The way Hidan watched their bodies come together. The way his platinum hair, now a little dishevelled but still lovely, hung over his face. And not to mention the way the black gloves and stockings contrasted with and framed his long legs and muscular arms.

 

He did not get much time to take in the view. The succubus began thrusting his hips back like the needy tease he was. 

 

"Come on, Kakuzu. I know you can do better," Hidan tittered, licking his lips seductively, eyes locking once again as his gaze grew wild. 

 

Kakuzu growled at the challenge, fucking him harder and deeper. He set a punishing pace as he grabbed him by the waist and pushed him down. His hips slapped against Hidan's bare ass each time he drove his dick into him. 

 

"Yes, that's it!" Hidan groaned in relief as Kakuzu was practically rearranging his guts.

 

What a sight, Kakuzu thought—definitely worth selling his soul for. 

 

The succubus arched his back, eyes rolling back, lost in ecstasy. Kakuzu couldn't help but capture his lips for a wet, messy kiss. Hidan's legs stayed tightly wrapped around Kakuzu's body, rising with his movements and providing him with a better angle.

 

"Ah fuck!" Hidan gasped, his whole body trembling as Kakuzu hit his prostate repetitively at the new angle. Kakuzu seemed to be determined to reduce him to an incoherent mess. 

 

Although maybe he would be the first to succumb to that state, Kakuzu thought as he felt a familiar and intense warmth, coupled with growing pressure, building up in his lower stomach. 

 

In sync with his thrusts, he reached down and took Hidan's dick out of his jockstrap, where it had been restrained the entire time. That's when Hidan's breathing morphed into a frantic prayer as his gloved hands clawed at Kakuzu's scarred back. This succubus was exclusively, completely, and entirely his, with no exceptions or fine print.

 

"Where have you been all my life?" Kakuzu sighed low into the demon's neck, right where the tattoo with his name was.

 

"...?!" Hidan cried, his body tensing around Kakuzu as he came without a warning, tears running down his cheeks. Short streaks of cum spilled on his chest. With a long, breathy sigh, his eyes rolled back, and he fell onto the bed.

 

Kakuzu's vision blurred momentarily, and he emptied his second load deep inside Hidan with a shuddering groan. He could feel the heat of the seed spreading around him as he pulsated inside the succubus, marking him as his.

 

"Stay inside me," Hidan's voice was weak and shaky, yet it held so much power over him at that moment. Even if he tried to move, he couldn't. Hidan's legs kept Kakuzu's lower body captive, forcing him to remain buried inside with surprising strength. The succubus was determined to ensure that he was well-fed, filled, and bred, and with Hidan's tightness, there was no chance of anything escaping.

 

They remained in that position for a while, and the room filled with the sounds of heavy breathing and panting while the scent of sex, sweat, and a sweet aroma lingered in the air. Kakuzu rested in the crook of Hidan's neck, breathing heavily against Hidan's collarbone mark. 

 

He tried to pull away once, but Hidan strongarmed him back down by his shoulders, groaning and swearing, "I said, stay inside me!" under his breath as he did so. For how much fuss he was making, Hidan stroked his hair so tenderly that Kakuzu decided he didn't mind laying on top of him, feeling his dick get soft inside him. 

 

When he was finally able to untangle himself, Kakuzu's attention was drawn to the glowing tattoo on Hidan's stomach. He watched as the succubus gently stroked his slightly bulging belly and felt a strange mixture of surprise and accomplishment.

 

"There's so much, and it's all for me," the succubus purred softly, his heart-shaped pupils dilating as he looked up at Kakuzu with half-lidded eyes.

 

A dark flush spread across Kakuzu's masculine features, and he flinched as he felt himself twitch within Hidan again. Yet he couldn't help but feel a sense of pride.

 

***

 

Later, Hidan was proven wrong; Kakuzu had way more than two left.

 

After fucking Hidan into the mattress on his back, on the floor, on his hands and knees, and finally sideways against a wall, the two shared a cigarette on the balcony. And after fucking in the shower and Hidan riding Kakuzu in bed, the succubus was finally sated.

 

After finding a spell to hide Hidan's horns, which surprisingly only required Hidan to will them away, the succubus rested his head on Kakuzu's shoulder. He was now completely naked, except for his collar, which Kakuzu opted to keep on for the time being. They lay under new blankets, as the previous ones were soaked in bodily fluids. Kakuzu's repeated abuse of Hidan's prostate caused a different kind of spill, which was the last straw for the sheets, and they had to flip the mattress. Though Kakuzu would have to buy a new one, it would be a worthwhile investment.

 

"So you're not going to send me back, Kakuzu?" Without his horns, he looked like an average human with a silly face and strangely coloured, attractive eyes.

 

"Let's see how good you are at helping me with my work, but in the meantime, I don't mind," Kakuzu drawled back at him, dozing off, feeling drained but content for once.

 

"I mean, it's not like you have a choice. Until you die, your soul is tied to mine." Hidan murmured into his neck. He fit perfectly by his side, like he was made to be there. "When you die, I'll beg Jashin to make you an actual demon, alright?"

 

"Uh-huh." Kakuzu let out a sigh as he pulled Hidan closer to him while wrapping his tattooed hand over Hidan's pale shoulders. Before drifting off to sleep, he thought of how comforting it was to have a familiar warmth and a familiar scent in bed with him. He could make out the scent now—the scent of the early days of April. 

 

 

 

Notes:

Fun fact the initial title was: "The devil looks after his own", because Hidan really is Jashin's special creature :)

Thank you for reading! Please feel free to leave a comment, would love to hear what parts people liked!