The strong master and disciple become skin (Pixiv Fanbox)

　A world overrun by monsters and phantoms.

　Against overwhelmingly powerful foes, the human race fights back with supernatural forces like magic and martial arts. Yet not everyone possesses special abilities. The lives of the powerless fade away as fleetingly as petals scattered by the wind when the seasons turn. In such a world, two martial artists journeyed.

　Rouga, a young practitioner of the ancient martial art 【Karate】 passed down in the eastern island nation. Though appearing slender at first glance, his physique was steel-hardened by daily rigorous training. When he shed his uniform, the expanse of his chest and the deep valleys of his abs became starkly visible. The muscles from his shoulders to his arms were supple, veins bulging with each powerful strike, his sweat-glistening skin gleaming.

　His face, with its bold eyebrows, large eyes, and straight nose, is exceptionally rugged, yet carries an undeniable aura of sensuality. Polite and filled with a strong sense of justice, Rouga lost his parents to a monster attack in his childhood. Raised by the master who saved his village, he never forgot this debt. Day and night, he trained himself relentlessly, pushing himself to the limit.

　His master, Gouken, was a formidable warrior skilled in all martial arts, having mastered 【Judo】 in particular. Though past forty years of age, his body remained muscular and powerful, his chest thick and bulging, hard as mithril, his abdominal muscles forming deep grooves like rugged mountain ranges. Both arms and legs possessed a robustness reminiscent of thick iron bars, and when he clenched his fists, they held the power to shatter steel.

　His face, perched atop a neck as thick as a tree trunk, bore a stern expression. His closely cropped hair framed sun-darkened skin, beneath thick brows sat predatory, piercing eyes and an aquiline nose, while his square jawline, like the sole of a wooden clog, was covered in a thick beard. Though he'd grown concerned in recent years about gaining excess fat, his physique still radiated overwhelming masculinity.

　Gouken, who once lost his beloved wife and daughter to monsters while away from his homeland, continues his journey to prevent such tragedy from repeating. A passionate man, he cherished the unrelated Rouga like a true son. Yet, this very kindness made him trusting and prone to being deceived.

＊＊＊

　Rouga and Gouken were finally enjoying a proper meal at an inn in a small village. In the inn's dining room, the fireplace crackled pleasantly, its orange glow softly illuminating the wooden beams and tables. Decorations of old shields and swords hung on the walls, and the gentle sounds of villagers and travelers laughing and glasses clinking filled the air. The aroma wafting from the pot the innkeeper stirred behind the counter—a rich stew of herbs and meat—filled the room, while the windowpanes fogged over with night dew.

　For the two, who had eaten nothing but rock-hard bread and haphazardly roasted game hunted along the way for days, this elaborate, piping hot stew felt like a blessing from heaven.

　Rouga took a sip of the soup, his Adam's apple bobbing slightly. He let out a satisfied sigh and relaxed his face.

"This is delicious, Master. Best meal I've had in days!"

　Gouken tore off a piece of bread with his gnarled fingers, dipped it into the stew, and shoveled it into his mouth, laughing heartily.

"Yeah, you're right, Rouga. You can't fight on an empty stomach. Eat your fill when you can!"

　Outside the window, the sky had turned a heavy, gloomy color, as if it might cry at any moment. Low, muffled thunder rumbled from beyond the layered mountains, shaking the air, while occasional flashes of lightning briefly illuminated distant peaks in white. The village was still peaceful, but the surrounding atmosphere felt somehow unsettling, making the skin crawl like the harbinger of a storm. As the innkeeper came to clear the plates, he lowered his voice and whispered.

"You gentlemen seem confident in your skills, but do you know there's an old dungeon near this village? Adventurers come here aiming for that place, which is how this inn manages to stay afloat. But lately, things have been terribly strange…… None of the groups who headed for that dungeon have come back. A squad of soldiers even came from the kingdom to investigate, but that was the last we heard. If you value your lives, stay away."

　Rouga and Gouken exchanged glances. If left unchecked, the demon's grasp might eventually reach even this peaceful village. Inside the warm inn, the two silently nodded to each other.

＊

　The heavy rain that began pouring down like buckets turned upside down late at night had fortunately stopped completely by the next morning. Still, the sky remained covered in heavy clouds, and mud clung stubbornly to their boots as if to block their path. Rouga and Gouken began climbing the mountain path early in the morning. Rouga led the way with light steps, clearing the path ahead, while Gouken followed behind, striding effortlessly with a carefree air.

　As they neared the forest's edge, the sky began to weep again, a light drizzle tapping the leaves. Though muddy from the rain, the path was well-trodden by adventurers' boots, with no grass growing, so there was no fear of getting lost. As they hurried on, a figure crouched in the shadows ahead came into view. Rouga instantly tensed, radiating a sharp aura. Gouken too clenched his fist like a rock, veins bulging on his taut upper arm.

　As the two cautiously edged closer, the figure noticed them and cried out in anguish, 'H-help me!!' before collapsing onto its backside, its knees buckling. It was an old man wrapped in a robe, its hood pulled deep over its head.

　His frail body was as thin as a withered branch, and his trembling limbs showed no sign of strength. When the hood was removed, white hair and a white beard appeared. His wrinkled face looked weak and helpless, his frightened eyes wide open.

　Gouken recalled the conversation he overheard last night at the inn between the innkeeper and the guests. On the way to the dungeon, a misanthropic herbalist lived alone, coming to the village once a month to sell medicine. That medicine was said to be exceptionally potent and highly reputed, or so they claimed.

"Hey, old man. You alright? We're martial artists here to kill the dungeon boss. We're not your enemies."

　When Gouken spoke gently, the old man—a herbalist who called himself Genan—exhaled in relief and slowly stood up. Genan, too, had concerns about the monsters infesting the dungeon and had come searching for ingredients for potent medicine. To hear the rest of the story, Rouga and Gouken decided to head to Genan's house before venturing into the dungeon.

＊

　The house nestled modestly deep in the forest, clinging to the moss-covered rocks beneath a cliff. Though the wooden cabin was old, its interior was surprisingly orderly, filled with the scent of herbs and the smell of medicine. Countless books and bottles lined the shelves, and notes scribbled densely on parchment were scattered across the desk. Several hand-painted portraits hung on the walls, showing a gentle-looking woman and a young girl smiling toward the viewer. Each painting radiated affection, the brushwork itself seeming to seep with deep feelings for the subjects.

　Genan's story was heavy. The boss that ruled the dungeon was an Elderlich, a being condensed from the grudges of countless wizards who had fallen to black magic, a monster possessing even greater intelligence than an Arcrich. This particular dungeon's Elderlich, he said, specialized in illusions. Genan explained he was developing a potion capable of piercing through these illusions. Fearing the Elderich or its minions might be hiding among the villagers, he lived alone in this remote place. Gouken nodded in understanding.

　Suddenly, Rouga considered asking Genan about his family. But remembering the portrait on the wall, he swallowed his words. Gouken reached the same conclusion, his stern face twisting further. His thick brows knitted, tears welled in his sharp eyes, and his lips trembled beneath his thick beard. Clenching his fists tightly, blood seeped from the palms where his nails dug in.

　He himself had once lost his beloved wife and daughter when his hometown was attacked while he was away. The despair and helplessness from that time surged back into his chest. Genan's obsession mixed with hatred for the monsters, his face deeply furrowed by loneliness──everything mirrored his own.

　The hot-blooded man stifled a sob deep in his throat, desperately suppressing the emotions hidden within his rock-like chest. He fought back a single tear threatening to roll down his dark cheek, averting his gaze to stare at the ceiling. Since coming to love Rouga like a son, he rarely recalled that day, but this sense of loss remained an unhealed wound.

　But he couldn't afford to cry. As a man, as a master, he couldn't show weakness here. Gouken quietly sniffed back the snot threatening to drip from his nose, careful not to let the two notice.

　Whether aware of their thoughts or not, Genan continued quietly.

"Actually…… the medicine is already complete, but I have no one to test its effects on…… If you would be so kind, would you two try this medicine?"

＊

　Genan dipped a ladle into the large black kiln, scooped up the liquid inside, and poured it into a ceramic cup. A dull, purple-hued 【something】. Even from a distance, its eerie nature was unmistakable. Bubbles rose steadily from its viscous surface, as if it were the carefully boiled essence of a liquid scooped from the bottom of a poisonous swamp. Depending on the light, it resembled darkened blood, radiating an unfathomable malevolence.

　And he expected me to believe this monstrous thing was a potion resistant to magic? It would make far more sense if it were explained as a forbidden, deadly poison refined during a cursing ritual. Yet strangely, when they brought their noses close, the scent that drifted up was a sharp herbal aroma mixed with the crisp freshness of some pure flower, undeniably suggesting potent efficacy. This gap confused their minds and shook their wariness.

──To drink or not to drink.

　Gouken clenched the cup in his hand and abruptly looked away. His gaze fell once more upon the portrait on the wall. The gentle woman and the smiling young girl. Genan's loneliness and loss were condensed within that image. A hot surge welled up in Gouken's chest.

　Why have I trained this body and kept traveling? He was just like me. The despair of losing his beloved wife and daughter when monsters attacked his hometown while he was away. Memories of nights tormented by helplessness, crying out in anguish, came vividly back. I won't let anyone else suffer that tragedy. So that old men like Genan won't have to endure loneliness and pain. To create a peaceful future where no one else loses family and suffers like we did……!

　Drink it. Believe. If this potion is genuine, it drastically increases our chances of defeating the dungeon's threat.

　Resolved, Gouken gulped down the liquid in his cup. His adam's apple bobbed violently, and a purple droplet leaked from the corner of his mouth, tracing a thin line down his thick neck. Seeing this, Rouga tilted his cup with a shout. The viscous, slimy sensation slid thickly down their throats, and the weight settling in their stomachs made both their bodies tremble.

　His body began to heat up, his chest tightening painfully. Breath caught in his throat, his vision blurred. Was this a side effect of the medicine? Or was it──.

　Both men dropped to their knees, crouching and writhing in agony. Gouken's steel-like body trembled violently, his thick chest heaving wildly as sweat drenched his tanned skin. Rouga's taut abs spasmed as he writhed on the floor like a dying insect. Amidst their agony, what echoed in their ears was──the old man Genan's maniacal laughter.

"Kukeke……, Ke-kyahahahaha!!!"

　A jarring, unpleasant laugh, filled with malice. As the two men, overwhelmed by the sensation of strength rapidly draining from their bodies, desperately lifted their heads, there stood Genan──or rather, the face of some other creature, tongue hanging limply, an evil grin spread across his wrinkled face.

"Fools! Idiots! Utter fools~~~!! This is precisely why I can't stop deceiving humans! Just tell you a little tearjerker story, and you believe it hook, line, and sinker. Truly, such easily manipulated fools. Hya-ha-ha-ha-ha~~~!!"

＊

　Rouga regained consciousness to find himself sprawled on the cold stone floor. In the flickering dim light, his vision remained hazy and blurred. He strained his arms to sit up, but they offered no response. The muscles he had disciplined and trained so rigorously felt as if they had vanished, as if he had turned into nothing but paper.

　Now utterly helpless, Rouga's mind was instantly flooded with anxiety. What had become of his master? What would happen to him now? Such grim thoughts swirled endlessly in his head.

　As he lay there, footsteps approached, and Genan appeared. Standing beside him was a skeletal monster clad in a robe. A black robe, adorned with elaborate gold embroidery, clung to its inorganic, pure white skeleton. Pale blue flames flickered deep within its eye sockets. Rouga instantly realized this was the Elderlich Genan had spoken of.

　An eerie presence. Bones rattled faintly, as if laughing, sending a cold shiver through the surrounding air. Surely, this demon had bewitched the kind-hearted Genan with illusions, trapping both him and his master in a snare──.

　But the next moment, Rouga doubted his own eyes. Just as Genan grinned, his back cracked loudly, and Arclich emerged from within. The form of the old man, who had been alive just moments before, instantly became like skin peeled from a corpse, flopping to the ground with a thud.

　Rouga could only stare in bewilderment. He had no idea what was happening. Even his master, Gouken, had never spoken of such an abnormal phenomenon. For a human to become skin──.

　Elderlich, realizing Rouga had regained consciousness, clacked his skull like laughter—though his expression remained unreadable—and raised a dark cloth-like object in his hand. Seeing it, Rouga lost his voice. It wasn't clothing──it was skin.

　Wire-hard crew-cut hair, the contours of a powerful physique etched with countless scars. The bulge of a thick chest, the rugged, chiseled abs, the lines of extremely thick arms. All of it spread out, thin and flimsy. Yet, Rogua knew instantly it belonged to his master, Gouken. That steel-like armored frame, that masculine physique forged to protect the people, was now nothing but hollow skin. The stern contours of his face were pitifully sunken inward.

　Despair surged through Rouga's entire body, draining the blood from his face. Why? How could this happen? Gouken was his respected master, stronger than anyone else. There was no way this could happen to him. This must be a dream. That's it…… Just a nightmare. It was the only conclusion he could reach. If he acknowledged that what lay before him was reality, something inside him felt like it would break.

＊

　The Elderlich and the Arclich remained silent throughout. Only pale blue flames flickered within their eye sockets. A withered, bony hand lifted Gouken's skin. Thin and flimsy now──, the final state of a brave man who had fought monsters as humanity's guardian. The Elder Rich slowly began its invasion through the slit in his back.

　Bony──no, bone-itself legs slid slickly into the hollows of the thick-skinned legs, squelching and grinding against the flesh within. Then, Gouken's five fingers began to wriggle. It was clear they were being controlled by another will. Next, the arms, then the torso. The skeletal frame sank beneath the skin, pressing tightly against it as if violating the memory of its former master's muscles.

　Finally, the Elderlich, wearing Gouken's scalp like a hood, pressed his own skull firmly against the skin of Gouken's face.

　The wrinkled skin clung to the bone, the outline of the thick beard regaining its tautness, while the gash on his back squirmed and wriggled, closing in an instant.

"Gwaaaaah!! Get out of my body, Elderlichhhhh!!! This body is mine……, my own body I built to protect the peopleeeeee!!"

　Ironically, being possessed by the monster allowed Gouken to speak once more. His deep, passionate roar echoed through the quiet room. Yet, he possessed no strength left to resist. He could only clasp his head, crouching on the floor, a faint aura leaking from his entire body. It was utterly no match for the overwhelming power of the high-level monster.

　His body was being taken over. Reduced to a vessel for a monstrous entity. The very body that had sworn to save as many humans as possible was now being defiled. A whirlpool of terror, rage, and regret churned within Gouken. Unaware that Rouga was trapped in the same situation, Gouken let out a piercing scream.

"Help meeeee, Rougaaaaa!! I……, I can't go on! Destroy this body…… with your own hands!! If a monster is going to take over my flesh…… I'd rather be killed by you! Pleaseeeee!!"

──Stop it!!

　Rouga tried to scream, his throat trembling, but his lungs couldn't draw air. Only hollow breaths escaped him. That his master's dignity could be desecrated so blasphemously……

　As this unfolded, the Elderlich's body began swelling beneath Gouken's skin. Gouken's thick muscles fleshed out the skeletal frame, tautening the sagging skin and making veins bulge. Both arms once again became thick as iron bars, the abs split into six packs, and the thick chest plate rose magnificently.

"Ahh!! Ohh…… Stop……♥ Something's entering my……, my cock…… being violated from the inside, uuuuugh♥♥♥"

　Gouken rolled onto his back on the floor, scratching his scalp frantically as he arched his back like a shrimp, thrusting his hips high toward the ceiling. His fully exposed, rigid cock throbbed with bulging veins, growing abnormally hard. Inside it, the newly created Elderlich's young cock swelled at an incredible speed.

　In an instant, the two cocks fused perfectly. From the enormous plum-like glans at their tip, clear pre-cum spurted out in spurts.

　The monster's intrusion forcibly evoked a pleasure akin to having his brain directly violated by a cock. The symbol of masculinity, maintained through asceticism to protect humanity's peace, was defiled by the enemy's lust and reacted of its own accord. Despair and humiliation mingled, distorting Gouken's stern face into a slackened grimace of pain and pleasure.

"I…… I'm gonna cum…… Don't look at me……, Rouga…… Mmmphhhhhhh, I'm gonna shoot~~~~~♥♥♥"

　The moment Elderlich's skeletal body and Gouken's powerful physique became completely fused, a massive fountain of semen erupted from the convulsing, colossal cock. An extraordinary volume of thick, potent male fluid splattered across the floor, the repeated ejaculations forming pools. Gouken's dignified face contorted into an ecstatic expression, his tongue hanging limply from beneath his thick beard as he wore a blissful smile.

＊

　Standing there was Gouken himself, just as he had been moments before. Sun-tanned black skin, a flat-top haircut, a rugged face with thick stubble. An overwhelming masculinity, the presence of a martial artist who seemed to radiate an aura from his entire body at all times. No one would ever suspect a monster lurking within such a flawless human being.

"Indeed, the physique of a sturdy male is splendid…… Even this foul-smelling cock suits my taste. To drown in lewd pleasure with this steel body, instead of protecting the people…… What supreme perversion♥♥"

　Touching his own arms and chest, as if licking his own flesh to confirm, 【Gouken】 stroked his erect cock, his face melting. Thick veins bulged along the rod's surface. Pre-cum overflowed from the taut, crimson tip of his swollen glans, dripping in strings.

　【Gouken】 softened his masculine features and smiled at Rouga, still in his skin.

"Wahaha, Rouga! Just now, even I let out a little whimper…… but don't worry! Right now, I feel absolutely~~~ amazing!! Sure, I got worn by the Elderlich, but I'm still me. In fact, I feel like the power of me and the Elderlich have merged, making me a flawless being!!"

　At those words, Rouga froze. He could easily imagine what would come next. And he was right.

"Rouga…… Why don't you get yourself worn by that Arclich over there, just like me? Let's aim to be the strongest together! Huh?"

　The voice was unmistakably Gouken's. The intonation, the phrasing—everything was that of his well-known master. Yet, the underlying strangeness, the abnormality in those words. And above all, seeing 【Gouken】's cock erect like he'd never seen before, Rouga knew for certain. This wasn't his master. It was a fake, wearing his master's skin, having taken over his body──!

　【Gouken】 took hold of the raw, unpeeled Rouga and violently rubbed his own hardened cock against it. His rod, slick with pre-cum, slid smoothly beneath Rouga's skin, pulsing with delight at the sensation. The feeling of rubbing up and down Rouga's skin body, from tip to base, made 【Gouken】 cry out in ecstasy.

"Foooooooh…… Yeeesss, t-that feels sooo good……!! My…… my strongest cock is going inside Rouga……♥♥"

　As 【Gouken】 moved his hips, lost in pleasure, Rouga's skin body swayed inorganicly. Rouga tried to struggle, but it was futile resistance.

"Now then, it's about time you became the strongest, just like me……"

　After one ejaculation, 【Gouken】 entered his post-nut clarity, and Rouga's skin was handed over to Arclich. From the slit in his back, a cold, inorganic skeletal body began to invade. The bone legs, devoid of warmth, slid slickly inward, grinding down with a squelching motion that violated the flesh's texture. The terror of having his own body manipulated by another will. But Rouga's resistance was futile. Arclich slid his body completely inside Rouga's skin. Once he finished covering his head with the skin, the slit in his back closed.

"Fooooooohh!! My…… my body…… merging with another's…… a monster's body……! Guhhh!!!"

　With a voice of agony, Arclich's skeletal body began to swell within Rouga's skin.

"Guh, no……!! I don't want to become a monster! M-Master…… help……"

　Arms, legs, torso—each part of his body was being overtaken by the monster. Humiliating, despairing, yet sensually pleasurable sensations devoured his body. And then, the most vital thing in his lower half was taken from Arclich. The feeling of another man's cock entering his own. It was intense, a searing sensation that made his mind go completely blank.

　His entire body shook, his vision flashing white. The moment his identity as a man was destroyed──.

"Aaaah!! Master, help me!! My…… cock!!"

　Rouga thrust his hips skyward while tearfully staring at 【Gouken】's face beside him. Please, help me…… Master.

"Oh, Rouga…… Watching you—whom I've cherished like a son—have your body taken over by another, your cock twitching and trembling…… I'm having the most incredible jerk-off of my life……♥ Show me more and more of your face, twisted in agony, for your master to see!!"

　Upon hearing Rouga's plea, 【Gouken】 wore a genuinely delighted smile. Like a beast taking pleasure in watching its prey struggle desperately, the corners of his mouth curled upward. Betraying Rouga's expectations, 【Gouken】, his face flushed crimson, was lost in self-pleasure. Despite having just ejaculated moments before, copious amounts of pre-cum overflowed from his urethra. With each stroke of his penis, strands of fluid stretched out, and droplets even splattered.

　The bond between master and disciple was so easily defiled by perverted lust. Rouga's heart shattered. As if in response, the moment Arclich's body inside Rouga finished expanding and returned to the taut physique of a martial artist──a sweet, overwhelming sense of fulfillment, like bone and flesh fusing together, assaulted Rouga against his will.

"No…… If my body gets taken over by the monster too, it'll be the end…… But I can't hold back anymore!! I'm gonna cum~~~♥♥♥"

　Thick, youthful semen spurted forcefully from his taut crotch, splattering repeatedly in parabolic arcs. Filled with post-ejaculation exhaustion, Rouga lay limp, limbs sprawled, breathing heavily.

　The instant he reached climax, Rouga's body belonged to the Arclich.

＊

"Hmm…… I like this face, but the body’s a bit off……"

　The figure of 【Rouga】 standing before the mirror was flawless. His youthful, rugged features—a sharp brow, large eyes, a well-defined nose bridge—exuded a quiet sensuality.

　But the body supporting them was too slender and lean, slightly off from Arclich’s preference.

　He wanted a more solid, muscular build—a sturdy, beefy body. To put it another way, yes──like Master Gouken's, an overwhelmingly masculine physique wrapped in steel-like muscles.

　Suddenly struck by an idea, Arclich raised the corners of his mouth meaningfully and slowly began to strip off Rouga's skin. The thin, membrane-like skin peeled away from the skeletal frame, fluttering gently through the air before settling onto the floor. Next, he took a slender knife, pressed it against the skin at the nape of the neck, and sliced smoothly through. It cut through effortlessly, without resistance. The skin covering the head and the skin covering the body parted cleanly, as if severed without a single lingering attachment.

　Seeing this, 【Gouken】—Elderlich too—softened his stern, bearded face into a smile and likewise shed his skin. The powerful physique became a hollow membrane; he pressed a knife to the neck and made one elegant cut. Head and torso snapped cleanly apart.

　Arclich slowly began wearing the skin of Gouken's body, first received from the Elderlich. He slid bony hands into the hollows of the thick arms, rubbed his sternum against the inside of the thick chest plate, pressed his ribs against the rock-like abdominal muscles. The hairy groin swelled hotly, and the cut at the nape of the neck settled with a sweet, squelching sound. After confirming the seamless fusion of his own torso bones with Gouken's skin, the moment awaited was donning Rouga's facial skin.

　Arclich slowly pulled that handsome face skin over his head.

　Wrinkled skin clung to bone as the young man's face regained its tautness. After a squelching distortion of facial flesh, what stood there was a forbidden hybrid: beneath the youthful face of Rouga lay the formidable physique of Master Gouken. Tanned skin scarred by countless wounds, a broad, muscular chest, thick arms and legs. A steel body forged to protect the people now bore a youthful, fierce face. And the expression on that face was not one of noble protection, but a smile filled with ugly, vulgar desire.

"Wahahaha! This is it, this is what I wanted!! The face of a youthful, handsome young man combined with the thick, muscular body of a middle-aged martial artist……♥ This is the ultimate! The greatest perversion!! Hehehehe, I can't take it anymore♥♥"

　【Rouga】 let out a voice full of delight as the mirror conjured in midair by magic reflected the fusion of two bodies. Then, with a massive fist like a boulder, he slammed it hard against his thick chest. The impact made his pectoral muscles ripple, and his cock between his legs instantly hardened. Pre-cum was already overflowing uncontrollably, dripping in strings onto the floor.

　Elderlich, watching this scene with envy, hurried toward the storage room deep within the house. Opening the door, he found others like Rouga and Gouken—those who had been turned into skin by the drug—hung on hangers, carefully stored like cherished garments. Elderlich reached for the largest skin among them. It belonged to a man even larger than Gouken, a wild, hairy body with thick chest hair and armpit hair growing wildly. The tattoos etched into it radiated the ferocious charm of a bandit's skin.

　Elderlich gently separated the head from the torso with his knife, just as before, then slipped beneath the furry skin. He pulled Gouken's head skin over his own bony face, pressing it firmly against his skull.

"~~~~~♥♥♥"

　The slit in his back closed, and at a furious speed, the bandit's muscles enveloped the Elderlich's bony limbs. 【Gouken】 rolled onto the floor with a thud. Scattering male pheromones, he writhed in pleasure. The sensation of thick muscle fibers fleshing out his bones in both arms and legs, the vibration of his heart pounding deep within his broad chest, the feeling of an extremely thick, foul-smelling cock hardening between his legs. 【Gouken】's stern face melted into a dazed, ecstatic expression.

　Beneath Gouken's fierce face, honed through countless battles to save the people, a crude, beastly torso connected. His buttocks bulged outward, his tattooed pectorals swelling like massive breasts. The boundary between Gouken's head and the bandit's body slurped and squelched as it melded together.

"Y-yes, this skin……, so wild……, rock-hard and muscular!! The cock's thick too…… so thick…… kuhh, so sturdy……♥♥"

　【Gouken】, overcome with excitement, grabbed his cock and jerked it off at high speed. Occasionally pressing his nose against his thickly hairy armpit, he sniffed the musky scent, lost in ecstasy as the magic mirror reflected his full-body image—a fusion of the martial artist and bandit indulging in self-pleasure. The intense, masculine scent emanating from his thick-haired body. A pleasure unique to a living, flesh-and-blood form, one he could never have experienced as an Elder Rich, devoid of touch or smell.

　Moreover, with each surge of pleasure, Gouken's brain felt increasingly familiar, almost as if it were his own. Stealing the memories of a human who had lived forty years and destroying that dignity felt utterly depraved…… and incredibly good.

　As his excitement peaked, 【Gouken】 thrust his hips upward toward the ceiling, erupting in a torrent of thick, copious semen.

＊

"Ah, no…… No, Master…… We're master and disciple, like father and son……!"

　The bedroom bed creaked and groaned as if it might break at any moment, the two men's gasps mingling together. The heat and the sound of flesh colliding echoed throughout Genan's entire house.

"Mmmph!! Feels so good, so fucking good, Rougaah♥♥ My cock is buried deep inside your──no, inside 【my own】 asshole, uuuugh♥♥"

　The face belonged to Rouga, but the torso was Gouken's. For 【Gouken】, thrusting his cock into that partner's anus, it felt as if he were raping himself. Complete destruction of dignity. The act of pretending to be Rouga and Gouken—now reduced to mere skin, unable to utter a word—devouring each other's flesh was utterly immoral and sweet. An intense pleasure, impossible to achieve in a skeletal body, seeped into his very bones.

"Ah, no……, Master…… If you thrust so hard, I'll…… get broken♥♥"

"This is training too, Rougaah! More, moreeeee! I'll train your asshole muscles with my fucking cock!! Get fucked in the ass and cum for me, you bitch♥ I'm gonna shoot my load deep inside you toooooo!! I'll pour every last drop of my boiling hot cum straight from my balls into you……♥ Take this♥♥♥"

"Ahhh!! M-Masterrrr♥♥ Anngh, ahhhhhhh♥♥♥"

　A forbidden union between two beings whose heads and torsos no longer align. As their flesh rubbed against flesh, each surge of arousal sent lightning bolts of intense pleasure coursing through their entire bodies. On the bed, 【Rouga】 and 【Gouken】 violently entwined their bodies, releasing a thick, masculine scent as they reached climax again and again. As a result, a sticky, viscous pool of male fluid formed on the bedroom floor.

＊＊＊

"Elderlich and Arclich──no, Gouken and Rouga. In recognition of your achievements this time, I shall promote you to executive positions."

　The Demon King's throne room, its black marble walls flickering with the pale blue flames of torches, held a cold, solemn air. The two kneeling figures bowed their heads reverently and answered in unison.

""We thank you, Demon King!!""

　Gouken, the martial artist who had cut down countless monsters. Rouga, his spirited young disciple. Though they appeared human in every way, their true forms were Elderlich and Arclich—monsters clad in human skin. Already, monsters disguised as elite adventurers, guided by them, lined the throne room in rows.

"We shall continue to make full use of this detestable human skin for the Demon King's sake, driving them out from within!"

　Gouken's voice echoed through the throne room. Thanks to the two of them, the monsters now blended into every corner of the kingdom in human form. Their plan was to devour the unsuspecting humans from within.

"I'll leave it to you. They will believe us, in human form, to be their fellows and place their trust in us. The moment that trust is trampled and betrayed──show me more, more of those faces stained with despair♥"

　Rouga and Gouken's deeds were immense. Having falsely claimed to have slain the dungeon boss, the two were hailed as the village's heroes. Their first act was to toss that purple potion into the village's only well.

　The next morning, the villagers lay sprawled across the village, drained of all strength, turned to skin.

　The sturdy farmer, the muscular blacksmith, the young hunter──all of them drank water drawn from the well first thing that morning, transforming into flimsy costumes before collapsing lifelessly to the ground.

　The two tried these skins on the countless skeleton minions overflowing within the dungeon. The skeletal bodies rubbed against the insides, muscles formed, skin stretched over them. Instantly transformed into perfect human forms, the skeletons gained intelligence from acquiring brains and achieved a dramatic level-up.

　Furthermore, they spread the sweet rumor that valuable materials could be obtained from the dungeon now devoid of its boss. The adventurers who swarmed in were also transformed into skins one after another. Muscular warriors, mages capable of casting advanced spells, priests skilled in healing──when each skin was worn by a high-level monster, the synergistic effect made them even more formidable beings. For the Demon King's army, there could be no more efficient way to replenish their ranks.

　At the dungeon entrance, two heroes stand guard once more today, warmly welcoming the new adventurers gathering. Of course, after deceiving them into drinking the well water by claiming it's an expensive buff item──.

"Now then, first I'll teach you the greatest pleasure a human can obtain! It's sex──, a ritual where you monsters are reborn as humans, while experiencing an intense pleasure unlike anything you've ever known!!"

　Today, the master-apprentice duo of Gouken and Rouga had transformed another promising, muscular warriors into skins. They dressed skeletons in those skins and were now completely naked in the dungeon's hidden room. The skeletons, having just donned human skin for the first time, looked a bit awkward. Their fresh, inexperienced appearance intensely stimulated Gouken and Rouga's sexual desire, and both of their manhoods were already fully erect.

　The overflowing, unstoppable pre-cum served as lubricant as he coated his fingers, gently loosening the former skeletons' anuses before slowly inserting his own towering cock.

　The sensation of the hot cock penetrating their bodies from within made the monsters, now possessing human bodies, cry out in high-pitched moans.

"Mmm……♥ Ahhh♥♥ Ohhh♥♥♥ Aaaahhh!!"

　Their voices, initially hoarse, gradually deepened into the coarse tones of battle-hardened warriors. And within their minds, greatly enhanced by human brains, the pleasure of reproduction became deeply engraved. Through repeated intercourse in countless positions, the skeletons became thoroughly accustomed to the warriors' bodies.

"OHH……, yeah♥ Gouken, thank you for giving me such a wonderful body. Though saying thanks while getting my asshole dug out might be a bit much……♥"

　What adorable fellows. Though they look like rough-and-tumble types, they're as pure as newborn creatures, utterly endearing.

　Gouken and Rouga ruffled the newbie humans' hair while thrusting their hips fiercely, deepening their pleasure.

"Oooohhh!! Demon King, thanks to you, we've experienced the sensation of pleasure for the very first time♥♥ To gain human vessels and be granted such incredible feelings…… We thank you from the bottom of our hearts ♥♥♥"

　Spurting thick, milky fluid with each thrust, the skeletons—now warriors—grinned broadly, drenched in their own semen, offering prayers of gratitude to their beloved Demon King. Another being, still in human form, swore allegiance to the Demon King. Humanity had no way of knowing. Slowly but surely, the Demon King's army was infiltrating from within.

(End)