Ninja Kurokage ーThe Coital Body-Transformation Techniqueー (Pixiv Fanbox)

"What…… where am I……?"

　Kurokage, a ninja, regained consciousness in a dark room illuminated only by the flickering flame of a candle. A sweet, ripe-fruit-like scent hung in the air, leaving him with the strange sensation that his brain itself was beginning to melt.

　He had infiltrated the castle together with his comrades as a spy, intending to gather information from within the enemy's ranks. But he had been cornered and captured before he knew it. And yet, he had not been thrown into a dungeon, nor did he appear to be facing any sort of torture. He was not even bound with ropes.

　He had been laid out on the tatami floor, and though he wondered what was going on, he slowly tried to raise his upper body. But——

"Damn it…… I can't…… move!?"

　It felt as though his entire body had somehow turned to mud. Only then did he realize what was happening. The scent filling the room had robbed him of control over his body. At the same time, he found himself wondering what had become of the subordinates who had been captured alongside him.

　Because his consciousness was still hazy, he could not make it out at first, but he could hear ragged breathing and the rustling of clothing coming from somewhere around him. There was no doubt that someone besides himself was present. More than one person, at that. They might be his subordinates.

　Kurokage forcibly twisted his neck, which seemed to be the only part of his body he could move, and turned his gaze toward the side where a light was burning. As his blurry vision gradually came into focus, he saw the shadows of two figures entwined together. The moment he strained his eyes and recognized who they were, Kurokage caught his breath in shock. There before him were his handpicked, highly capable subordinates, in a most indecent state.

　They were completely naked, their bodies entwined on the tatami as sweat poured from them. Further back, in the darkness, other subordinates were similarly entangled.

"You!! What the hell are you doing!?"

　He cried out instinctively, but the men did not react. They simply continued to grope each other's bodies, surrendering themselves entirely to their instincts. The dreamy expressions on their faces as they caressed each other's taut, muscular bodies made it painfully clear just how far removed this was from their usual selves.

——A shinobi must always make self-restraint his guiding principle.

　Even though this should have been only natural for them as ninjas, what on earth had happened to his subordinates? They had never even shared a bed with a woman, let alone had any experience with male love. Kurokage could not begin to understand why they were behaving so wildly in the very heart of enemy territory, and he could only remain bewildered.

　Just then, the fusuma at the back of the darkness slid open, and a man appeared. It was an old man dressed in a dark ink-colored kimono, worn in the simple kinagashi style. He was so emaciated that he looked as though he were little more than skin and bones. His hair, slicked straight back, had turned completely white, and countless wrinkles covered his face. Yet his eyes alone gleamed with an unnaturally fierce light.

　Those piercing eyes fixed themselves upon Kurokage. The sheer intensity of his gaze nearly overwhelmed him, but he somehow managed to stand his ground and opened his mouth.

"Who the hell are you? No, more importantly, what in the world have you done to my men!? Is this your doing!?"

"Hohoho…… Now, now, don't get so worked up. You'll be just like them soon enough."

　With that, the old man lifted the hem of his kimono and exposed his groin before Kurokage. There, utterly disproportionate to his aged body, was a huge cock, throbbing with prominent veins. The sight spread a look of despair across Kurokage's face. He realized that the old man intended to impale him with that enormous cock.

　Kurokage's body, honed through years of daily training and relentless self-discipline, was covered in hard, powerful muscles. Lately, however, he had been unable to escape the effects of age, and a faint layer of fat had begun to settle over his frame. Because of his sensuous physique and his rugged, distinctly masculine appearance, he had often caught the eye of the masters who had employed him over the years, and on occasion had served as their bedmate.

　As a result, the private part of his body had accepted the 【things】 of countless men, but he had no confidence that he could take something as monstrous as that.

　What's more, considering the situation he was in now, he had nothing but a bad feeling about what was to come. This old man was almost certainly the one responsible for seducing and corrupting his subordinates. If so, there was no doubt that he possessed powerful ninjutsu. If Kurokage were to be taken by a man like that, he had no idea what sort of fate awaited him.

　Kurokage twisted his body, desperately trying to escape, but as before, he had no control over his movements. The old man approached him with an eager grin, then suddenly seized both of his legs and spread them wide apart.

　Perhaps the scent filling the room had an aphrodisiac effect. Kurokage's asshole was already twitching, leaking intestinal fluid from within, and unconsciously responding to the cock before it, the lewd opening repeatedly gaped and closed.

"S-stop……!"

"Muhoho…… Now that's looking nice. Let me have a taste."

　Ignoring Kurokage's cries of protest, the old man ran his tongue over his anus. A warm, slippery sensation assaulted the hypersensitive mucous membrane. Then the old man began roughly working Kurokage's anus open with his fingers.

"Nngh……♥ S-stop……"

　It was a strange sensation, unlike anything he had ever experienced during sex before. Overwhelmed by an unfamiliar pleasure he had never known, Kurokage could not help but let out a pathetic moan. But that was not all. If anything, the old man only became more forceful, thrusting his bony fingers deep into Kurokage's hole and continuing to toy with it.

　Eventually, once it had been sufficiently loosened, the old man once again pulled out his own huge cock. It was still an unbelievable size, impossible to imagine belonging to an old man. What was more, it was dark red and fully engorged, throbbing violently as though it were some entirely different living creature.

　He then dripped the viscous liquid he had been holding onto his huge cock and smeared it all over its surface with an ecstatic expression. Then he pressed its tip against Kurokage's now thoroughly loosened asshole.

　There was nothing left for him to do but steel himself for what was to come——.

　Oblivious to Kurokage, who was gritting his teeth, the old man slowly began burying his enormous cock inside the lewd opening. The pressure was so intense that he could almost hear a wet, tearing sound as it forced its way in.

　Even so, thanks to the aphrodisiac, there was almost no pain. His body, craving the invading cock, moved along with it, gradually accepting the foreign object deeper inside.

（How……? Why is this happening to me!?)

　Kurokage cried out in anguish inwardly, but naturally, the old man could not hear him. The cock continued to be pushed deeper and deeper into his anus. Its overwhelming presence could be felt through the walls of his intestines.

　Despite the unprecedented strain he was experiencing, he was simultaneously assaulted by an indescribable pleasure. Kurokage's back naturally arched sharply backward.

　By the time the entire length of the cock had finally disappeared inside Kurokage, all the way to its base, beads of sweat were pouring from his entire body. Barely able to breathe, he desperately fought to remain conscious. If he lost consciousness here, there was no telling what the enemy might do to him.

　Seeing Kurokage maintaining a brave front, the old man withdrew his cock from inside him for a moment. Kurokage felt a sensation of relief akin to the pleasure of relieving himself, and was filled with a sense of ease——but only for an instant.

　The very next moment, the old man drove into Kurokage's body again with renewed force. The impact was far more violent than before. With loud, wet friction sounds, the old man repeatedly thrust his cock deep into Kurokage's anus.

　Kurokage was given no chance even to cry out, and could do nothing but be shaken relentlessly. The more his innards were gouged by the cock, the more heat welled up from deep within his body.

　The liquid the old man had smeared over his cock earlier—perhaps that had been an aphrodisiac as well. Its effect was tremendous, and little by little, Kurokage began trembling with the pleasure of accepting the cock inside him.

　Each time the old man thrust his hips back and forth, the cock between Kurokage's thighs gradually swelled and reared upward, then was violently flung from side to side. Clear pre-cum sprayed in all directions from the urethral opening, leaving stains across the tatami.

　The part of Kurokage that was already being penetrated by the old man had been transformed into an organ devoted solely to pleasure. The flesh of his intestines writhed against his will, wrapping itself around the cock inside him. Each time the glans struck the deepest part of his asshole, a violent stimulation that seemed to reverberate all the way into his brain assaulted Kurokage.

　Perhaps stirred up by the sight of the old man thrusting his hips with an intensity impossible to imagine from someone his age, Kurokage's subordinates began mating even more violently, their deep, masculine moans rising as they became increasingly aroused. Seeing this, the old man twisted his lips into a pleased smile and increased his pace even further. Every time he thrust into Kurokage's anus, frothy fluid burst from the point where their bodies were joined, accompanied by a splattering sound.

"Guuuuh……! Fguuuaahh!!"

　Overwhelmed by the sheer force of the impact, Kurokage opened his eyes wide and let out a beastlike roar. He was nearing his limit. If the old man thrust into him even one more time, there was no doubt he would reach climax. Sensing that reaction with uncanny precision, the old man swiftly formed a hand seal in front of his chest.

"Rin! Pyo! To! Sha! Kai! Jin! Retsu! Zai! Zen!! Here we go! The Coital Body-Transformation Technique!!!"

　The old man's rigid cock gave an especially powerful tremor, and a large quantity of semen was released into Kurokage's body. A hot torrent filled his rectum with an audible rush, causing Kurokage's body to convulse violently. Under the force of that intense stimulation, Kurokage finally reached the limit of his endurance.

"Nnghaaaaaah~~~!!!"

　With a scream, his back arched like a bow, and his body sprang violently upward. At the same time, his throbbing, massive cock shook violently, and a large amount of milky-white fluid erupted from the tip of his glans.

　It traced a wide arc through the air before splattering heavily across the faces and bodies of his subordinates. Drawn by its pungent, musky scent, they all swarmed toward Kurokage's cock at once. They flicked their tongues over it, licking it again and again, even trying to squeeze out every last trace remaining in his urethra.

　Kurokage gazed blankly at the ceiling as his body trembled with pleasure. An overwhelming sense of release unlike anything he had ever experienced before washed over him. Feeling a profound sense of fulfillment permeate his entire body, he gradually drifted into a drowsy sleep.

＊

　About half an hour later, Kurokage slowly regained consciousness. His head was still a little hazy, but for the moment, it seemed that the danger to his life had passed. The room was still filled with the same sickeningly sweet scent as before, but he realized that he could move his body again.

　Kurokage slowly raised his upper body and looked around. The old man lay sprawled on his back directly before him, while his subordinates were still gathered around. But they had all stopped what they were doing and were sitting formally in seiza, staring at Kurokage.

　There was a faint, expectant smile on their faces, and the way they watched him filled Kurokage with an indescribable sense of dread. Perhaps his subordinates were still under some kind of illusion. Determined to break the spell, he opened his mouth to shout at them.

　But what came out of his mouth were words he had no intention of saying at all.

"Uhe, hehheh…… It's been a long time since I've had the body of a young male…… Even without an erection, this cock is impressively large! What an indescribably pleasant feeling."

　Kurokage twisted his rugged features into an ugly expression and wore a vulgar grin like that of a lecherous old man. His own cock was still flaccid, but it was every bit as enormous as the old man's, and after being stroked only a little, it began to swell with engorgement, its veins standing out prominently.

(Damn…… What is happening!? Not only can I not control my body, but words are coming out of my mouth on their own……)

　While Kurokage remained in utter confusion, his finely trained body was being controlled against his will. His cock, having been kept in abstinence for so long as a ninja, suddenly sprang to a powerful erection for the first time in what felt like ages, and the resulting motion caused it to strike against his abdomen.

"Ho~ho, take a look at that. By my will, even your cock is doing this. It seems your body has acknowledged me as its master as well. Everyone, from this day forth, I——no, 【I】, Kurokage, shall become your leader!"

　Kurokage declared this triumphantly, the corners of his mouth still raised in a grin. Hearing his words, his subordinates all erupted into cheers, leaping for joy. Kurokage looked down at them with satisfaction before continuing.

"Good! Then let's move on to the final step! You lot, watch closely!"

　Kurokage poured that same thick, transparent fluid over his proudly towering huge cock, then began slowly thrusting it into the asshole of the old man lying there like an empty shell.

(You bastard, what are you——!? Haaahhhhhh♥♥ W-what…… what the hell is this pleasure!? M-my head…… I-I feel like I'm going crazy!!)

"Looks like it's been quite a long time since 【I】 was the top……♥♥ Feels good, doesn't it?"

　The old man who had stolen Kurokage's body was likewise overwhelmed by the exquisite pleasure of having sex in another person's body for what could have been more than a decade. Kurokage's rugged face twisted with pleasure as the old man lost himself in the sensation.

"A young male body really is the best! Ah, ah, aahhh♥♥♥ I'm going to come! My new seed……♥ Now, this body is MINEEEEE!!!"

　Having formed the same hand seal as the old man had earlier, Kurokage thrust his huge cock deep into the old man's asshole with all his strength. His entire body shuddered, and his scrotum tightened and drew upward as he released the semen he had stored up deep inside the old man's body.

　At the same time, the original Kurokage experienced the sensation of his consciousness moving from his head to his torso, and from his torso down into his lower body. Then, as that consciousness was expelled from the tip of his cock, it was drawn into the old man's body.

＊

"What…… what's going on here!? Why the hell am I standing right in front of myself!?"

　The old man awoke, clutching his thinning white hair with both hands, and let out a hoarse cry.

"Ku-hahaha…… So you've finally awakened. I've taken your body for myself. Don't worry. This body you've spent years honing and training——I'll be taking good care of it from now on. As for you, do your best to live a long life in that withered old body of yours, and keep my men entertained."

　Kurokage raised the corners of his mouth in a smile, lifted both arms, and flexed his biceps, striking a pose that showed off his powerfully muscular physique. That body was nothing short of an ideal form for a homosexual man who was attracted to muscular, masculine men, and whenever he shifted his body, his muscles rippled with movement. His captivated subordinates could not help but let out sighs of admiration.

"Oh, that's right! There's no point in asking your men for help, either. Just like you, they have already had their bodies switched with 【my】 subordinate elder ninjas through 【The Coital Body-Transformation Technique】. What now resides within those vessels is no longer the minds of your capable subordinates. They now house obedient souls that bow down before 【me】. Fuhahahaha……"

　Mocking the old man, Kurokage slowly reached a hand toward his own crotch. There, Kurokage's enormous cock, which until just moments ago had been buried inside the old man's asshole, still stood powerfully erect, overflowing with pre-cum. The sight filled the old man's face with despair, and he collapsed where he stood.

"Ah, well, that's how things are. Enjoy what little remains of your life as best you can…… Though, from now on, you'll be nothing more than a plaything for my men. Hey, you lot! Go have some fun with that old man!"

　Obeying Kurokage's command, the naked men who had been standing by nearby quickly surrounded the old man.

"Eek! P-please, stop…… You lot, it's me…… I'm your leader, Kurokage……"

"Heh heh…… How foolish. Didn't I already tell you? Those men are no longer your subordinates. Looks like you've become senile right down to the brain!"

　The old man gritted his teeth in frustration as the man wearing his former appearance looked down at him with an exasperated expression. With his arms and legs held down and a tongue running over his cock, he was unable to resist and could do nothing but have his body defiled.

　The men who had once been his trusted subordinates licked every inch of his skin, now reduced to little more than bones and skin, and in response to the stimulation, the old man's entire body gradually flushed pink with arousal.

　Kurokage watched the old man, who was involuntarily keeping his extraordinarily huge cock erect and making it twitch, with a satisfied smile.

"Looks like your cock is quite pleased to be mating with young men. From now on, I think I'll make sure to fill you with plenty of our cum every day."

　When Kurokage signaled to his subordinates with a glance, one of them pressed his hardened cock against the old man's asshole. Seeing the lust-clouded eyes of a man he had trusted and worked alongside for ten years, now looking like an entirely different person, the old man trembled with fear.

　No matter how many times he was told that "the person inside was different," the old man could not help but feel despair at being violated by someone who looked exactly like a man he had fought alongside as a comrade. Before he even had a chance to resist, the lust-driven cock was forcefully driven into his anus.

"Eeeek! It hurts! Ah…… Nngh-oohhh♥ Th-this can't be……! It's a lie!! Ahh, aahh, aaaaahhh~~~♥♥♥"

　There was no such thing as a technique capable of exchanging bodies. This had to be an illusion——.

　Even when he tried to convince himself of that and escape from reality, the unfamiliar sensations assaulting his body were so overwhelming that he could not help but cry out. It was a level of pleasure more intense than anything he had ever experienced in his entire life. As he was violated one after another by the men who had been his comrades only an hour earlier, the old man continued to shriek.

　Watching the scene, Kurokage gripped his own cock and slowly began stroking it. The sight of his former body, which he had continued to use for more than a decade, being violated by these men was profoundly perverse. And knowing that these acts were being carried out by men who wore the same appearances as comrades Kurokage had once trusted only made the sense of taboo all the more intense.

　Drunk on the obscene sensations that reverberated all the way into the brain of that youthful body, Kurokage shuddered from head to toe.

"Fuhh, that's good!! I can't get enough of that expression! Let me see more of it♥♥"

　Beside the old man, who was being roughly penetrated by the muscular ninjas, his tongue hanging out as his cock shook violently, Kurokage continued stroking his huge cock, beads of sweat glistening across his taut, muscular skin.

　The more miserably the old man was violated, the more strongly Kurokage felt that he had truly been reborn as a young, powerful ninja.

　The strength surging through his entire body, the scent of young, musky sweat, the seed that continued to be produced within his testicles—everything was perfect. Even the old man's broken, intermittent moans were a pleasant stimulus to Kurokage's ears, continually fanning the flames of his desire.

"Guh…… I'm gonna cum, you decrepit old man!! Take all my cum!!!"

　With a deep, gravelly voice, Kurokage shouted those words before unleashing thick semen, as though it had been boiled down, from his huge cock. A tremendous amount of milky-white fluid poured heavily over the old man's face, and the pungent masculine scent twisted his features into an ugly expression.

"Hah…… hnnngh~♥ Th-this smell…… it's the smell of my own cum♥♥"

　As he blushed at the hot, viscous sensation trickling down his face, the old man let out a sweet moan and pointed his twitching, throbbing cock toward the heavens. Having completely lost his senses, he was pinned down by the men in a state of ecstatic delight, then driven into a frenzy as they continued to roughly assault his asshole.

"Ah, ahh, I can't hold out anymore♥ I'm cumming♥ Nngh-ooohhh, I'm gonna cum from getting my asshole drilled♥♥♥"

　Impaled in the ass by men who wore the forms of his former comrades, the old man finally reached his limit, tears streaming down his face. At the same time, the ninjas surrounding him also reached climax, spraying large amounts of semen toward the old man's body.

　After watching the sight of the old man being bred by those men, Kurokage likewise finished ejaculating and threw his massive body down onto the tatami.

"Phew…… That was quite an entertaining show. As I thought, nothing compares to ejaculating in a young body……♥"

　Pure white seed fluid ejaculated by the men was spilling from the old man's gaping asshole. Seeing it, Kurokage curled the corners of his mouth into a smile.

"Looks like you're enjoying yourself quite a bit too…… But we're not finished yet. Next, you're going to let me have a taste of that huge cock of yours in my asshole!!"

　The old man stared blankly at the ceiling as he heard Kurokage's words. Whether he had simply given up on resisting, or his thoughts had merely stopped functioning under the overwhelming pleasure, he did nothing more than let out faint breaths and soft groans.

　Kurokage gently reached a hand toward the old man's crotch. Grabbing his huge cock, he began stroking it steadily.

"Fuh…… Still full of energy, I see, you pervert♥"

　Bringing his lips close to the still-hard cock that had once belonged to him, Kurokage took the foul-smelling thing deep into his mouth. Sweet moans once again began to escape the old man's lips, and before long, clear fluid began to seep from the tip of his glans.

　The taste of his own pre-cum from only moments earlier further fueled Kurokage's rising excitement, driving him into an even greater state of arousal.

　After thoroughly licking up the fluid, even twisting his tongue into the urethral opening to clean it out, he climbed astride the old man and rubbed his erect cock against his own asshole.

"Nngh, ahh…… nghhh♥ Hah, hah…… Here we go! Enjoy your former asshole to your heart's content♥"

　As Kurokage lowered his hips, the huge cock was swallowed deep inside his hole with wet, plunging movements, disappearing all the way to the base in an instant. The old man's face twisted with pain, but he seemed unable to resist the unfamiliar pleasure surging through his entire body, and his expression soon melted into one of bliss.

"Haah, aahh♥ Th-this is incredible! The sensation of welcoming my former cock back into my own body…… It's the best♥♥♥"

　Shuddering from the pressure he felt deep within his abdomen and the pleasure that arose from it, Kurokage began moving his body up and down, completely lost in the sensation. Each time the old man's huge cock stimulated his prostate, a lightning-like shock shot through Kurokage's entire body, leaving him with the dizzying sensation that his very brain was going numb.

　While vigorously rocking his newly acquired, unused cock, he frantically squeezed and kneaded his own thick, muscular chest. He teased his pink nipples with his fingertips, then flared his nostrils and inhaled the scent of his sweat-dampened armpits. Hot breaths escaped Kurokage's lips.

"Fuh, fuuuh♥ Guhhhhaaah!! This is too good! This body is incredibly sensitive♥♥♥"

　Kurokage's well-trained, powerful body was clearly different from the old man's. Yet when it came to sheer sexual vigor, it had not diminished at all——in fact, it was even more potent than before.

　His limbs were thick as logs, in stark contrast to the old man's thin, withered frame, while steel-like muscles covered his entire body. He had thick eyebrows that conveyed the strength of his will, a solid, square jaw, and a wild, rugged appearance accentuated by his sharp eyes.

　The 【old man】, reborn into a young and powerful body for the first time in many years, could not help but feel more excited than ever before. On top of that, the sight of his former self gasping and writhing in pleasure right before his eyes only drove Kurokage's lust even higher.

"Guh, nghhh, aaaaah♥ I'm cumming! I'm gonna cum againnn!!"

"Nnnghooooh, I can't hold back either! I'm cumminggg~~♥♥"

　The moment Kurokage slammed his muscular buttocks hard against the old man's crotch, the two men, whose bodies had been exchanged, reached climax. White fluid erupted simultaneously from their two huge cocks. Kurokage's semen splattered forcefully across the old man's face and body, while the old man's semen poured in great quantities into Kurokage's body.

　With the old man's cock squeezed tightly by Kurokage's muscular asshole and caught between the walls of his intestines, every last drop of seed was milked from it. The seed fluid that could not fit inside spilled out, forming a pool of semen across the tatami.

　After savoring the thick semen that had been released in such abundance inside his body for a while, Kurokage rose to his feet and pulled the old man's cock out. Pure-white fluid spilled out of the now-unplugged hole in long, stringy strands. Kurokage caught it in his hand, then licked it away with his tongue, an expression of reluctance to let the sensation end crossing his face.

"I suppose this is goodbye to this magnificent huge cock I was so proud of, and to the rich, creamy taste of its seed… You lot, take this pitiful old man to that room reserved for sex. After that, do whatever you like with him."

　At Kurokage's command, the subordinates hoisted the old man, who still wore a vacant expression, and quietly carried him out of the room.

　The remaining subordinates crouched down on one knee, still completely naked, and bowed their heads toward Kurokage. Their cocks were all still hard and erect, throbbing as though they could hardly wait to mate with their leader, Kurokage.

　Seeing them like that, Kurokage smiled with satisfaction.

"Good! Then from now on, I'll be the one to pleasure all of you!"

　These were the elite shinobi handpicked by Kurokage himself. Every one of them possessed a powerful, muscular body no less impressive than Kurokage's own. Just looking over their thoroughly trained physiques was enough to make Kurokage unable to contain his excitement.

(Heh heh…… Thank you, 【Kurokage】, for gathering such outstanding men for our sake!!)

　With that thought, Kurokage walked toward the group of virile men, their bodies radiating a potent masculine scent.

(End)