Turn my beloved into a masturbation sleeve (Pixiv Fanbox)

　In the distance, the melody announcing six o'clock in the evening played. The park was completely dyed a deep indigo by the winter darkness. With streetlights installed only sparsely, more than half the course was dimly lit.

　His breath rose white, the cold air piercing deep into his lungs. Teppei Fukami always chose this time to run.

　The deserted running course before dinner. For most people, the darkness and lack of people would warrant caution, but Teppei, with his imposing build, didn't care one bit. In fact, he found this quiet comforting. He hated the bone-chilling cold, but he didn't dislike the sharp winter air rushing through his nostrils while running. The sensation of his lungs tightening and blood rushing through his body cleared the fatigue from Teppei's mind.

　Beneath his tight running gear, Teppei's tall, muscular frame glistened with heat and sweat. Beads of perspiration trickled down his cheeks, scattering droplets around him as his broad chest rose and fell. His sturdy, thick legs kicked the ground powerfully, his firm glutes tracing lewd curves beneath his pants. The faint glow of the LED briefly illuminated Teppei's sweat-drenched, sensual skin, only to be swallowed back into the darkness.

＊＊＊

(Phew~, Feels good today too…… This route's quiet at this time of day, perfect for focusing!)

　The off-duty firefighter kept a steady pace, stoic. All he heard was the distant howl of a dog somewhere, the sound of his own footsteps, and his heartbeat. No other sounds reached him.

　Teppei hadn't noticed. From deep within the shade of the trees, a gaze always watched him, holding its breath. That gaze belonged to Kazuo Umehara. Wrapped in a worn-out down coat, his sweaty, clammy hands gripped a strangely shaped gun.

　His balding crown. Sweat-stuck bangs plastered to his forehead. Puffy eyelids and a squashed pig nose. Freckles dotted his face, accentuating his ugly features. Short and pot-bellied, his physique was the very picture of ugly metabolic syndrome. Even though he was just standing there, sweat poured from his entire body like a waterfall.

(Aah……, Teppei……♥ Today, I'll finally…… make you mine……)

　The moment Teppei passed near the shade where Kazuo stood──Flash! A rainbow light enveloped Teppei, and instantly his body began shrinking and deforming.

(Wh-what is this……!? My body…… won't move……!!)

　As if crushed by an invisible giant's hand, the sturdy, muscular Teppei's entire body instantly melted and shrank like clay. It was as if his bones had never existed. His height, over 180cm, and his well-trained, muscular physique were compressed, shrinking pitifully smaller and smaller──, transforming from a realistic human form into something resembling a deformed figurine.

　Soft and elastic to the touch. Where his anus had become a tube, a hole opened up, just large enough for a penis to be inserted. Inside the hole were pink folds, making it resemble nothing so much as a masturbation sleeve.

＊

(Dammit! Who the hell did this to me?!)

　Unable to move even a finger, Teppei could only feel a mix of rage and confusion as a fat man suddenly appeared before him. His face flushed with excitement. Naked beneath his down coat, his flabby belly jiggled as his fully exposed virgin cock, still encased in its skin, stood erect, pointing skyward.

"Teppei……♥"

　Kazuo called out the name of Teppei, now transformed into a masturbation sleeve, in a low, unpleasant voice that matched his hideous appearance.

"I've been looking at you with lustful eyes for so long…… Seeing you during work, letting elementary school kids ride the fire truck out of kindness, spreading your gentle smile. I thought about making your handsome face and sexy body 【mine】 all the time……"

　Teppei, unable to move, felt a greasy, ugly face loom closer. The foul, fishy breath of a middle-aged man—one might suspect he hadn't brushed his teeth—blasted against various parts of Teppei's cylindrical body.

(This stinks like crazy……! You bastard……! What the hell did you do to me!?)

"Nuh-huh♥ You see……, I can use magic, just like in anime and manga. With this ray gun, see♥"

　The gun rested in Kazuo's soft, fat-covered palm. To Teppei's eyes, it looked like nothing more than a toy gun.

"When I point this gun at someone I like and pull the trigger, they instantly turn into a masturbation sleeve……, just like you are now ♥♥ I've always wanted to put my cock in your asshole, Teppei……"

　Kazuo thrust his cock deep into Teppei's giant, masturbation sleeve-like asshole. A warm, slick sensation enveloped Kazuo's cock.

──THUMP! Slurp……, slurp slurp!!!

　Teppei's insides contracted as if alive, sucking onto Kazuo's defenseless manhood.

(Goddamn……! Stop it, you bastard……! This feeling…… my ass……!)

　Teppei's consciousness trembled with confusion and humiliation. His finely sculpted, muscular body had suddenly been transformed into a helpless masturbation sleeve, and fear overwhelmed the rage in his mind. But Kazuo ignored Teppei's cries and began thrusting his hips violently back and forth.

"Ahh, mmph! It's incredible…… your asshole! It's so tight and PERFECT♥♥"

　The inside of Teppei's ass, which had been so tight just moments ago, was now being mercilessly gouged. The virgin cock of the middle-aged man fucking the now-masturbation sleeve-like Teppei didn't just hit his prostate—it pierced his entire body, pounding his brain like a raging torrent. It felt so good his vision flickered. Kazuo's pre-cum spurted repeatedly from Teppei's nostrils and mouth like vomit.

(Ugh……, hmmm……! Inside me……, you fat bastard's filthy cock is grinding and thrusting……♥♥)

　Kazuo's relentless high-speed thrusting wouldn't stop. Teppei remained conscious as a human, his entire body—now a single erogenous zone—continually ravaged. Both his flesh and mind were being overwhelmed by an intense pleasure he'd never felt before.

(N-no, I can't! I can't take it……! Being violated by a man's cock…… I'm cumming……!!)

"Guhehe, Teppei…… Are you about to cum? ……It's okay! Inside your ass……, I'm going to cum too♥"

──Squish! Squish! Squish-squish-squish! Splash-splash-splash♥ Splaaaaaaash♥♥♥

　Kazuo's desire exploded. Thick, sticky semen poured endlessly into Teppei's body like condensed milk. The extraordinary volume and heat nearly suffocated Teppei, who gagged and spat the viscous white fluid from his mouth. Kazuo nodded with satisfaction, watching his own thick cum spill out.

"Haa…… It's incredible, Teppei♥ Now a part of your body will become mine…… Ohhh♥ It's begun♥♥"

　What the hell is he talking about? Teppei already understood that this man, Kazuo Umehara, was insane, but had he finally lost his mind? As he pondered this, Teppei suddenly felt Kazuo's 【cock】 inside him rapidly expand.

(Gwaaaaah!! Kazuo's cock inside me is getting bigger……)

　Just as Teppei sensed, Kazuo's cock inside him swiftly changed shape. Like pumped-up muscle, it transformed into a magnificent, virile cock.

　With a wet pop, it was pulled out—thick as a log, blackened, veins clearly visible on its surface. Its length, thickness, hardness, color──, everything about it was the spitting image of 【Teppei Fukami】's cock.

(Wh-what……?! That cock……, it's exactly like mine!!)

"Hehehe! Teppei! The moment you ejaculated, your genetic information was absorbed into my cock, transforming it into a shape identical to yours♥"

(What the……?! You bastard, you're joking……?!)

　Kazuo shoved Teppei, who tried to protest, into the pocket of his down coat and left the place.

＊

　Teppei regained his vision and let out a cry of surprise.

(Hey, wait a minute!! This is my home! You're trespassing, you bastard!!)

　A single room in a studio apartment. It was a simple room, typical of a single man living alone. Socks lay discarded on the floor, along with adult magazines. A small houseplant sat alone on the low table. Teppei squirmed in shame, remembering he'd tossed used tissues into the trash can after masturbating earlier that day.

"Trespassing? Not a chance. Starting today, I'm the master of this house, you know?"

　Kazuo's hand gripped Teppei's body once more, forcing his monstrously huge cock deep inside Teppei.

(AHEEEE♥♥)

　Kazuo's hips began thrusting violently once more. This time, he was being violated by Kazuo in the private space of Teppei's home.

"Ohhhhh♥ Inside Teppei feels so good…… I wonder which part of your body will be mine next…… DEHEHE♥"

　The overwhelming humiliation from this massive cock was incomparable to being violated in the park. The tip of his glans seemed poised to pierce right through Teppei's head.

"Teppei's asshole! I can't take it anymore!!"

　Before becoming a masturbation sleeve, Teppei could have handled Kazuo's abnormal fetishes—things no ordinary person could understand—with a resolute attitude. But now it's different. The intense pleasure had made Teppei's rationality as thin as a spider's thread. Resistance was now impossible.

"Ahhh~~~, I'm cumming!!"

──Spurt! Splash splash……! Splaaaaash♥♥

　Hot semen filled Teppei's insides again, filling him until it became thick and gooey. Again. Teppei instinctively felt that sensation of another precious part of his body being taken by Kazuo.

"Gotcha♥♥♥ With the second shot, I'll take Teppei's precious face. Mmmph♥ OHOHO♥ Ohh, yeahhhh!!"

　Kazuo's unpleasant, high-pitched voice gradually transformed into a deep, rich baritone. His scalp began to wriggle, roots and all. Fine hair sprouted thickly across his balding head, instantly hardening like wire. Kazuo's original ugly face instantly became featureless, then began to transform into a well-proportioned, handsome face as it was kneaded and twisted. Thick eyebrows, large eyes full of determination. A high nose bridge and sensual lips. The thickness of his neck and the height of his cheekbones were also perfect.

(No, no…… Stop it, nooooo!!!)

　Teppei's death throes dissolved into the void. Kazuo, now sporting the face of a consummate athlete, flashed a broad smile and flared his nostrils wide.

"Ohhh……, ahh! Hehe! Look! Teppei! My face right now! It's the very image of firefighter 【Teppei Fukami】! Starting today, I am Teppei Fukami!!"

　Kazuo stood before the mirror, arms spread wide, dancing a dance of joy. But his transformation wasn't over yet. Though he'd been acting giddy, he immediately gripped the Teppei dildo and began rubbing his utterly transformed cock—squelch, squelch—against the inside of his own asshole.

　The third ejaculation. Hot semen poured deep into the Teppei dildo, mercilessly seizing control of his body. At that instant, a strange change occurred in Kazuo's lower half. The fat man's flabby legs gradually tightened, muscles swelling. Thighs like logs, calves hard as rock. And his ass──firm, taut gluteus maximus muscles formed, becoming the spitting image of Teppei's. Kazuo stroked the transformed parts of his own body with an ecstatic expression.

"Ugh♥ This is amazing…… Your legs and ass are mine now……"

(Cut it out already!!)

　A sense of helplessness gnawed at Teppei's heart. His body, built up as a firefighter, being taken by this fat guy…… Kazuo just grinned smugly with his manly face, the spitting image of Teppei.

"Today, I only got this much of your body, but tomorrow I'll take you all♥"

＊

　The next morning, Kazuo woke up in Teppei's bed at his home. His lower body was Teppei's powerful legs, his ass was firm and plump, and his face looked just like Teppei's. Seeing the new cock fully erect from morning wood reignites Kazuo's excitement.

(Ahh……♥ Teppei…… Your muscular body will soon be all mine♥♥ But……)

"Teppei~~~♥ You see, I can't go to work at your office looking like this, half-baked.

Give me your office number. I'll call in sick, so…… think of a cover story?"

　Kazuo picked up the Teppei-shaped masturbation sleeve carelessly tossed on the cold floor and whispered sweetly. Hearing those words, there was no way Teppei wouldn't fly into a rage.

(HUH?! You got to be kidding me, you bastard!!! If you wanna know, then change my body back!!)

　Teppei's stubbornness──, he didn't care if it meant an unauthorized absence. But Kazuo just grinned and thrust his cock deep into the giant asshole of the Teppei-turned-onahole.

(Whaaat?!! Oooohhhhh♥♥♥)

　Teppei's deep, manly scream echoed through the room. While inserting a penis into the body of a person transformed into a masturbation sleeve, the two connected individuals can share memories. The hot, tight interior squeezed his rock-hard manhood, and simultaneously, everything Teppei had ever experienced flooded into Kazuo's mind.

"Hello……, this is Fukami. I'm terribly sorry, but it seems I've caught a cold. I'd like to take the day off. Ah, yes…… I apologize for not being able to cover my shift today."

──SPURRRRT♥♥

　While talking on the phone with Teppei's colleague, Kazuo ejaculated deeply inside Teppei's body. The intense pleasure coursed through Kazuo's entire body, fueled by the sinful thrill of perfectly playing the role of 【Teppei Fukami】 and deceiving Teppei's colleague.

(Ahh♥ Teppei's memories and knowledge are flowing into my head♥♥ And his colleague didn't even notice I'm a fake…… Mmm, so good~~~♥♥♥)

　Kazuo's brain cells activated to absorb Teppei's memories. Along with this, not just his face and lower body, but the muscles in his shoulders, arms, and even his abs began transforming to look exactly like Teppei Fukami's. His pectorals bulged massively, his very skeleton shifted to form broad shoulders, and his arms swelled like logs. Sweat-drenched skin overflowed with 【Teppei Fukami】's pheromones, transforming Kazuo's entire body into a steel-hard physique.

"Mmmh♥……Yes. I can prepare the documents at home, so…… hmmm♥♥ Once I recover, I'll submit them…… Thank you for your time. I'll let you go now."

　Kazuo hung up the phone and stood naked before the mirror hanging on the wall to confirm his body, now identical to Teppei's. The reflection in the mirror was none other than 【Teppei Fukami】 himself. The muscular physique, the rugged features. Everything was Teppei's defining characteristics.

　Kazuo—no, the man who had now completely taken possession of 【Teppei Fukami】's body—thrashed wildly on the bed in sheer excitement, panting like a beast.

　The room filled with the lewd scent of sweat and semen, the morning light streaming through the window casting an eerie glow over his bulging muscles. His thick chest rose and fell, his chiseled abs glistened with sweat, and his log-like arms created deep creases in the sheets with every movement. Veins bulged on his thick cock, glistening wet, dripping with pre-cum. He grabbed the now-masturbation-toy-like Teppei with one hand and thrust his cock deep into the asshole. Inside was hot and slick, the semen from countless internal releases foaming, his asshole clenching down as if trying one last desperate resistance.

(Stop……, stop it……! No more……, don't take my identity away from meee!!)

　Teppei's cry of despair traveled through Kazuo's cock like a sweet electric current. It drove Kazuo even crazier.

"Haah…… Haaah…… Teppei…… Everything about you is mine now♥ This thick cock, these muscles, this face…… All that's left is to take the memories of everything you've experienced♥♥"

　Kazuo gripped the masturbation sleeve Teppei with his thick palms and slammed his hips with ferocious force. He shook his massive ass, digging into Teppei's asshole, stirring it up, violating it. Sweaty bodies rubbed against the sheets, the entire area soaked through with drool and semen. Kazuo's cock, pushed to the absolute limit of excitement, grew even larger inside Teppei, swelling with the force to pierce right through Teppei's skull.

"Your memories! Hand them all over to me……, right into 【my】 brain!!"

──Gurgle gurgle gurgle!!! Splurt, splurt splurt splurt♥♥♥ Splurrrrrr!!! Splurt splurt splurt♥♥

　Hot semen was mercilessly released into Teppei's body. Teppei's brain shook violently as the memories, personality, and habits of 【Teppei Fukami】 were forcibly crammed into Kazuo's mind. His experience as a firefighter, memories of saving citizens, the effort accumulated through training, the flow of having sex with women…… Kazuo's brain, having absorbed all of this, was overwhelmed by explosive pleasure.

"Ahh, yeahhh♥♥ OHHH!! Amazing……! Teppei's memories……! His mission as a firefighter, his pride in protecting citizens—it's all mine now!!"

　Kazuo rolled around on the bed, roaring with laughter, gripping the cock that was now completely his and jerking it off with a vigorous stroke. His rugged face, the spitting image of Teppei, contorted with pleasure and a sense of conquest, drool and snot dripping freely.

"Heh heh…… All the memories and experience as a firefighter are right here in my head…… Now 【I】'm absolutely, completely, TEPPEI FUKAMI!! Ha ha, ha ha ha!! Nnnhahahaha!!"

＊

"Did you get over that cold properly, Teppei?"

　The next morning, Fire Sergeant Takehiko Matsuda asked Kazuo, who had reported for duty at the fire station as 【Teppei Fukami】, with concern. Kazuo answered Takehiko with a cheerful smile.

"Sergeant Matsuda! Thanks to you, I'm completely better now. Sorry for the trouble."

　His expression and tone were pure Teppei. The deep voice and calm manner of speaking. The muscular physique, perfectly fitted in the firefighter's uniform. Everything was complete as 【Teppei Fukami】. Takehiko looked relieved and nodded immediately, seeming satisfied.

"I see. Well, that's good. Now, let's get started with training."

(Ha ha! I did it!! Sergeant Matsuda didn't catch on either……!)

　Kazuo wore a faint smile, but inside he was dancing with ecstasy. At the thought of living as 【Teppei Fukami】. The thrill of hijacking another man's life made Kazuo's cock twitch and throb inside his pants. To avoid anyone noticing if he got hard or ejaculated during work, he'd slipped a condom over his cock and taped it to his thigh with duct tape. He could feel copious amounts of pre-cum leaking out, slowly soaking the inside of the condom. While maintaining a serious expression and performing his duties, Kazuo kept his cock erect. He deceived his colleagues, who trusted Teppei, while lustfully ogling their muscular bodies as if licking them with his eyes.

"Excuse me. I'm just going to the bathroom."

　In the warehouse filled with firefighters' training equipment, Kazuo pretended to head for the restroom and pulled out the 【real Teppei Fukami turned into a masturbation sleeve】.

(Screw you! Give me my body back!! Hurry up and change me back!)

"FUHEHE♥ Damn, this onahole is so fucking loud…… I'm still training, but…… If you're gonna scream like that begging for cock, I'll give you what you want and shove my cock right inside you!!"

　Kazuo took the Teppei-shaped masturbation sleeve in his hand and thrust his raging, massive cock inside.

(NOOOOO♥♥♥)

　The warehouse was filled with the smell of dampness and sweat, faint voices of firefighters echoing from outside. Kazuo gripped the Teppei dildo and began thrusting his hips wildly. Inside the condom, pre-cum and semen mixed and foamed. Teppei's consciousness was jostled into a chaotic mess of humiliation and pleasure.

＊

(Everyone! That's not 【me】, he's a fake!!)

　After arriving at the fire station, Teppei cried out to his colleagues in a voice akin to anguish, but his words fell on deaf ears.

(Hehehe, useless useless♥ Only I, the owner of the ray gun, or the guy turned into a masturbation sleeve can hear your voice, y'know♥)

"Hey, Teppei, what's that? A figurine keychain? It's kinda big, and it looks like you."

　Sato, Teppei's peer, noticed the Teppei sex toy attached to his bag and called out. Sato's body was lean and muscular, just as Teppei remembered from his memories. The pectorals hidden beneath his uniform shirt strained against the fabric with every slight movement, and the muscles in his arms stood out. Kazuo answered calmly in Teppei's voice.

"Oh, this? I had it custom-made. Looks pretty much like me, right? Want me to make one for you too?"

(No, stop it! Don't you dare try to turn my colleague into a masturbation sleeve too!!)

　Teppei shouted, but there was no way Sato could hear him. Kazuo grinned inwardly. The thrill of proudly displaying this custom-made item──the real Teppei turned into a masturbation sleeve. Watching Sato stare intently at the sleeve made Kazuo's groin grow hot.

"I guess I am kind of interested……, but I'll pass for now."

　Sato waved lightly and walked away. Teppei let out a sigh of relief, but Kazuo's face broke into a smile. There was still time. During today's shift, he'd hunt for more prey.

　Ultimately, during the entire 24-hour shift, not a single person noticed that 【Teppei Fukami】 had been swapped by someone else. Kazuo's performance, a perfect copy of Teppei's memories, showed not a single flaw.

　During training, Kazuo made full use of Teppei's muscular physique, deliberately flaunting scenes of camaraderie with colleagues right in front of him. Naturally, this left Teppei's heart trembling with frustration and resentment.

(Damn it……! Everyone, that guy's a fake, please notice…… Hear my voice……)

　Teppei's anguished cry went unheard. His colleagues, having finished a full day's shift, began changing clothes and preparing to leave in the locker room. These rugged men, who protected the town's peace with their relentlessly trained, muscle-bound bodies as their weapons. To Kazuo, the sight of them shedding their uniforms in the steamy air felt like nothing short of an erotic show.

　Sato's lean, muscular build. His muscle mass might be a bit underwhelming for a firefighter, but his face is refreshingly handsome. His thighs are toned, his ass firm and perky. Next to him, Ogawa, engrossed in his smartphone, is the polar opposite—a beefy hulk whose physique is revered by muscle-loving gays. His briefs hug his semi-erect cock, outlining its shape sharply.

　Kazuo observed their sexy naked bodies with the gaze of a predator eyeing its prey. His thick cock, once straight, hardened inside his pants from the excitement.

(Look at them, Teppei. Your colleagues have bodies this hot…… Which one should I turn into a dildo? )

　The creepy gaze stopped in front of Takehiko Matsuda, the fire sergeant. Though only in his mid-thirties, Matsuda had a physique like a mass of muscle. His thick chest pushed out his uniform, and now that he'd taken it off, his sweat-soaked pectorals pulsed with every breath, asserting their eroticism. His ass was even bigger than Teppei's, and inside his boxer briefs, his thick cock and heavy balls hung low, the shape of his glans clearly visible through the fabric. Matsuda's body radiated the sensuality of an experienced man, stirring Kazuo's desire.

"Uh, Sergeant Matsuda. I've got something on my mind right now…… Would you mind having a drink with me at my home afterward? I'd like to talk things over."

(What?! Stop it, you bastard!! Sergeant, no! If you follow this guy, even Sergeant Matsuda'll end up as a masturbation sleeve!! Please, refuse him……!)

　Teppei's anguished cry, inaudible to anyone but Kazuo. Matsuda, with the same boisterousness Teppei remembered, flashed a smile.

"Alright, sounds good! It's been a while since we've had drinks at home. Let's grab some fancy booze and snacks."

＊

　Teppei's heartfelt wish went unfulfilled, and in the end, Matsuda came to Teppei's home completely unguarded. He set down the bags of alcohol and snacks he'd bought in bulk on the floor, loosened his shirt collar, and took a breath. His thick pectoral muscles peeked through the gap in his shirt, and the faint scent of sweat and cologne spread through the room. Kazuo opened a beer can and clinked glasses with Matsuda. After swallowing a mouthful of carbonated liquid, Matsuda's expression turned serious.

"So……, what's this consultation you wanted, Teppei?"

"……Yes. Well……, actually, I wanted you to take a look at this……"

　When Matsuda saw the ray gun Kazuo pulled out, his eyes widened and he tilted his head.

"Is that…… a toy gun? What's the deal with that? Haha……, you're not seriously going to shoot me with that, are you?"

　Laughing and joking, Matsuda raised both arms in a hold-up pose.

"Yep, exactly right, Sergeant♥"

　The trigger was pulled, and a rainbow-colored beam shot from the laser gun's tip, aimed straight at Matsuda.

"Woooooah!!!"

　From there, it was the same as with Teppei.

　Takehiko Matsuda's body was enveloped in a dazzling light and began shrinking rapidly. The steel-like physique he'd honed over nearly twenty years as a firefighter deflated like a popped balloon, shrinking small in an instant and transforming into a sex toy.

　The main body with a springy, rubber-like texture, featuring a large, cylindrically open butt hole. Its entrance gaped open, looking greedy, seemingly ready to swallow any man's cock whole.

(Guh……! Dammit!! What kind of joke is this!?)

　Fury made Matsuda's transformed body tremble violently. But now that he was a fish on the cutting board, anything he did was pointless. Kazuo picked up his new masturbator with an ecstatic expression.

"Hehe. Sergeant Matsuda's joined my collection too…… I think I'll play with this tonight ♥"

＊

(Teppei! What the hell is this?!!)

(Sergeant Matsuda, that guy is a fake version of 【me】! The real 【Teppei Fukami】 is me!!)

　With Matsuda turned into a masturbation sleeve, Teppei's voice finally reached him.

(From any angle, that guy over there is Teppei, yet he's a fake? And you, looking like a doll, are the real Teppei?! What the hell is going on?!)

　Teppei could only empathize with Matsuda's voice, a scream mingled with anger and confusion. His respected superior, the fire sergeant, had been reduced to the same helpless state as himself. Did this devilish man intend to take the place of 【Takehiko Matsuda】 next?

　As that terror flashed through Teppei's mind, Kazuo grinned and abruptly aimed the ray gun at Teppei. A flash of eerie light enveloped Teppei's body once more.

　Slowly, a powerful transformation began. His deformed, cylindrical body started expanding from within, muscles that had been dormant awakening with a hot, throbbing ache as Teppei's entire body swelled like a balloon. His simple face took on three-dimensional contours, slowly reconstructing itself into a sturdy jaw, thick eyebrows, large eyes, and a well-defined nose. The sensation of sweaty skin returned, and Teppei's nostrils filled with his own body odor──the masculine scent of sweat and muscle honed as a firefighter.

(Oh…… I'm back…… in my original body! I thought I'd be stuck as a sex toy forever, but I'm free!!)

　Teppei's heart overflowed with joy. The relief from being freed from the helplessness of being a masturbation sleeve, the thrill of regaining his strong, firefighter-like body, was profound. But at the same time, a question arose. Why had he been restored to his original state so quickly? No, this wasn't the time for such thoughts. Now was his chance!!

　Teppei tried to pounce on Kazuo. But──

"Huh?! My body won't move!!"

　He should have been free, yet he couldn't move even a finger. Despair suddenly overwhelmed Teppei.

"Too bad, Teppei. Once someone's turned into a masturbation sleeve by this gun, they can't disobey its owner anymore♥"

　Kazuo pressed the ray gun against Teppei's temple, grinning mockingly with the same face as Teppei.

"Now then, my faithful little servant. Insert your erect cock into Sergeant Matsuda's asshole—the one I turned into a masturbation sleeve."

　The vile command flew. Regardless of Teppei's will, his thick cock stood erect, pointing toward the ceiling, twitching and pulsing. In an instant, the tip of his rock-hard shaft, veins bulging, glistened wet with precum. Teppei's entire body moved automatically, gripping the masturbation sleeve-turned-Matsuda tightly, pressing his cock against the part corresponding to Matsuda's asshole.

"Stop……! No, I can't…… do this…… to Sergeant Matsuda, whom I respect……!!"

──Plop! Plop, plop-plop-plop!! Squish-squish-squish-squish!!!

(Aaarrgghhh!!!)

　The rock-hard, massive cock was sucked into the hole of the masturbation sleeve in an instant. Matsuda's inside was hot and slimy, clamping down on Teppei's thick cock as if it had been waiting for him. After just a few strokes, Teppei reached climax. The male juices, boiled down to vicious intensity, pounded deep inside the transformed Matsuda, spurting and gushing.

(S-stop it, Teppei…… please……)

　To the despairing Matsuda, Teppei apologized from the bottom of his heart.

"Sergeant Matsuda, I'm sorry, I'm so sorry…… This isn't my will……!"

　But Teppei's cock didn't stop thrusting. His hips moved of their own accord, continuing to violently fuck into Matsuda's insides. His thick chest was drenched in sweat, his ripped abs contracted, his thick cock remained hard—Teppei had become nothing more than a tool to endlessly violate his respected superior.

＊

"I can't cum anymore……"

　Teppei slumped limply against the sofa, his shoulders heaving violently as he gasped for breath. His normally insatiable body, capable of cumming five times easily, was now completely empty after just three shots. The reason was obvious.

　The guilt of having violated Sergeant Matsuda, the abnormal state of tension. And above all, the fear that he himself would become 【Takehiko Matsuda】—and the twisted excitement that somewhere deep down, he desired it—was eating away at Teppei's heart.

　After three cumshots, more than half of Teppei's body had already been replaced with Matsuda's. His chest was rock-hard like steel, and his sharply defined abs were as hard as stone. His arms were thick as logs, with massive veins bulging on his upper arms. His thighs, trained relentlessly as a fire sergeant, resembled sturdy, stable tree trunks. Yet, only his face and cock remained those of 【Teppei Fukami】. That was precisely why Teppei could still cling to his sanity.

(By tomorrow…… I'll have completely taken over Sergeant Matsuda and become 【Takehiko Matsuda】…… I have to find a solution before that happens……!)

　His brain was spinning at full speed as Teppei desperately searched for a counterattack. In that very instant, Kazuo flipped Teppei over, forcing him to kneel on the sofa. Leaning face-down against the backrest, his ass was thrust high in a vulgar pose. 【Takehiko Matsuda】's plump buttocks were exposed, defenselessly offered to Kazuo.

"Even if you change my position, I said I can't cum anymore……! Ughaaahhh♥♥♥"

──Thud!!!

　A thick, massive cock thrust deep into Teppei's anus in one go. The moment Kazuo's glans rubbed roughly against Teppei's prostate, hiss eyes rolled back, and saliva dripped from his mouth.

"Hyaaahh, ahh, ohhh……♥♥"

──SPURRRRRT!!!

　Teppei ejaculated copiously, semen overflowing from his connection with the masturbation sleeve Matsuda and soaking the sofa. Teppei's asshole tightened around Kazuo's cock like it was sucking it in, greedily swallowing it whole.

"Heh heh heh…… Still got plenty left, don't you, Teppei? Once you've been an onahole even once, your asshole's sensitivity increases tens of times. I'm going to make you into 【Takehiko Matsuda】 by the end of today♥"

(Hey, Teppei!! Are you okay?!)

　Matsuda's worried voice came from below. But Teppei couldn't even respond anymore. Kazuo forced Teppei onto all fours, then rolled a large full-length mirror on casters right up in front of him. He wanted Teppei to see his own transformation scene.

　Reflected in the mirror was the body of 【Takehiko Matsuda】, like a collage image where only the face had been swapped with that of 【Teppei Fukami】.

"Uhehe♥ Teppei, you wanna see the moment you transform into a completely different person, right? You wanna get excited watching it?"

(What a sick bastard……!)

　Matsuda burned with rage, but Teppei felt differently.

(……I want to see it. The moment my entire self becomes Sergeant Matsuda……)

　Respected superior. For straight Teppei, Matsuda was naturally never a sexual object. Yet once his body was transformed into a masturbation sleeve, it went mad. The sense of immorality at turning into the man he admired. The guilt at taking over another person's existence. That intensely stimulated Teppei's current instincts.

"I'm cumming, cumming, cumming~~~♥♥♥"

　His gaze was fixed on the mirror. Teppei's face, melted by pleasure, began to change. His bone structure shifted into a home plate shape, his cheekbones became rugged and prominent, his jawline grew solid and defined. His gaze shifted from Teppei's gentle eyes to Matsuda's sharp, raptor-like stare. His nose became hooked, nostrils flaring wide. His lips gained a sexy fullness, thick stubble sprouting around his mouth, completely transforming his facial impression.

──SMACK! SMACK! SMACK!! Slurp slurp slurp!

　Kazuo's hips wouldn't stop thrusting, driving his cock deeper into 【Takehiko Matsuda】's virgin asshole. Each timeTeppei's prostate was stimulated, semen spurted out in bursts from his cock, his asshole trembling with pleasure, becoming more and more addicted to 【Teppei Fukami】's cock.

"Wow…… My face…… is turning into Sergeant Matsuda's face♥♥♥"

　The moment his reflection in the mirror completely transformed into 【Takehiko Matsuda】's face, Teppei climaxed repeatedly in extreme excitement.

──Splurt! Splurt! SPLURRRRRT!!!

　And the final transformation. The once-thick penis grew slightly slimmer, further emphasizing the size of the glans. The rod's surface turned a reddish-black, the color of a heavily used. The enlarged testicles caused the scrotum to sag slightly, taking on a heavy, ripe shape. Even the DNA of the sperm writhing within had been rewritten to that of 【Takehiko Matsuda】. A thick, yellowish male fluid, viscous enough to impregnate a woman, spurted from his glans. Teppei kept his eyes fixed on this metamorphosis until the very end.

＊＊＊

"Sergeant Matsuda. It may be frustrating, but please wait inside the locker during my shift. I'll act as 【Takehiko Matsuda】, track that bastard down, and absolutely find a way to return our bodies!

(It pains me to place all responsibility on you, but you're the only one who can get revenge on that bastard! Count on you, Teppei!!)

　Teppei listened to Matsuda's resolve, then slowly closed the locker door.

"Alright! You guys, let's work out thoroughly again today!!"

──SMACK, SMACK, SMACK!!

　The training room inside the fire station. It's where firefighters on duty come to work out between emergency calls. Normally, the room would echo with the cold clang of metal-on-metal from the machines. But now, it reverberated with the heated, lewd sounds of bodies colliding.

　Nearly twenty burly male firefighters occupied the training room. Yet, far from building muscle, they were engaged in lewd sexual acts with each other. The floor, littered with used condoms, held puddles of the male scent—sweat and semen. The room, windows tightly shut to keep voices in, was thick with the heat and humidity of these virile men, suffused with the stifling, pungent male pheromones.

"Firefighter bodies, guys going at it in hardcore, beefy sex…… Feels like we're doing everything we're not supposed to, and I can't stop getting excited, seriously♥♥"

"My current obsession. Having sex with my wife while deliberately flaunting it to those who've become an onahole♥ It feels so damn like cuckolding, and even though I'm fucking a woman, I get insanely hard──highly recommend it to you guys too♥♥"

"Ugh~~~♥ No matter how many times I cum, my balls stay packed with sperm! Fuckin' amazing, firefighter's body♥♥"

　The men, each wearing a lecherous grin, were utterly captivated by the masculine sex they were having with their newly acquired, super-muscular bodies. Sweat poured from their entire bodies as their rugged faces contorted into ecstatic expressions, indiscriminately scattering thick, sticky DNA everywhere. And at their feet lay onaholes that closely resembled their own appearances.

　All the male firefighters working at this station had been transformed into masturbation sleeves by Kazuo's ray gun, their bodies stolen by Kazuo's fellow homosexuals. Their bodies taken over, their wives cheated on, they were even fucked by demons who had become exact duplicates of themselves. These homosexuals, who perfectly copied everything about their victims, lived entirely as their stolen bodies whenever they weren't at the fire station. Consequently, no one around them noticed their inner selves had changed.

　The fire station personnel, robbed even of their lives, could only accept men's cocks as toys for ejaculation and lament their fate.

"Ah, what have I done…… Taking over Sergeant Matsuda's body, then overlooking Kazuo's atrocities, betraying my fellow firefighters' lives to these filthy homo bastards…… What a…… What an awesome sergeant I am! Right, 【Teppei】?"

　His somber expression vanished as he called out to Kazuo in a delighted voice 【Takehiko Matsuda】. Kazuo, too, fully immersed in the role of 【Teppei Fukami】, began carefully sucking Teppei's thick cock with a smirk. Even while performing the blowjob, he spoke in a deep voice.

"Yeah……♥ Thanks to the sergeant overlooking what I did, the unity among the firefighters has become even stronger than before …… Everyone's grateful to you! Let's keep clashing skin to skin like them, so we can build even stronger unity that won't be beaten by anyone!!"

　【Teppei】 spun around, thrusting his plump ass out toward 【Matsuda】. Then, he took 【Matsuda】's thick cock deep into his asshole. 【Matsuda】, his face contorted in ecstasy, began thrusting his hips into 【Teppei】's asshole with single-minded intensity. Their muscular bodies glistened with sweat, the air thick with the scent of masculinity. Both 【Teppei】 and 【Matsuda】 moaned happily.

──Smack! Smack! Smack! Smack! Smack!

""Ooh♥ OH♥ Ooh♥ Aah♥ OHHHH♥♥♥""

　Thus, the fire station was reborn anew by Kazuo and Teppei. Day and night, the station personnel saved citizens with their finely trained firefighter physiques during calls, while back at the station, they indulged in hot, passionate male-male intercourse, toyed with the dignity of their bodies' original owners.

(End)