Beast Among Beastmen (unfinished)

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Shirou Ogami goes on a well-deserved break after the events of BNA, unaware that Alan's movements still shake the city when he's not around. One close look at a botched experiment turns the humble Silver Wolf into something... Bigger.


  • By @ShibidyBoop

A Beast Among Beastmen

The beastmen of Anima City were no stranger to the dangers of the nightlife. Those who were smart enough to avoid the streets stayed indoors enjoying the comfort of television or online media, while others seeking the thrill of midnight activities went to clubs or took nightly strolls. Everything was much safer than it originally was while Sylvasta Corp. took reign in the city. Every so often though, there would be an offender or two passing by. Nothing the local police department couldn't handle. And for one particular Beastman, he had his work cut out for him. After finally being convinced by Michiru to relax and recollect from such a long series of nights and battles with his yellow counterpart, Shirou rested in the Beastman Co-op sound asleep. A little too deep in sleep rather, as Kuro too rested... Right on his face. It humored him, but he slept soundly on top of the sleeping man-wolf.

That was until his phone rang, scaring the bird back onto his perch on the desk. For however long they lived together, he was still not used to Shirou's unnecessarily loud ringtone. The wolfman, deep in sleep, didn't register that his phone rang until the third ring. He silently stared at the ceiling as he woke, looking over at his night table where the phone lie, to see that the chief of the police department was calling. And at such a late time? He picked up the phone and sat up. With a rumbling, groggy voice, he responded.

"How may I be of assistance, sir?", Shirou asked.

The canine cop had guilt in his voice. "Listen, I know it's the dead hours and you're on your deserved break, but the fellas have made a discovery that has disaster written all over it. Not the kind of thing that can wait until daytime unfortunately," Yuji started. "If you're too tired, we'll send some specialists over and-"

"I'm already dressed.", Shirou interrupted, the sounds of shuffling cloth and stretching muscle coming through the speaker. The officer couldn't even protest, knowing it'd fall on deaf ears. "Gosh, it's always face first with you, hm? Alright, I'll send the location, be waiting for you with a cup of joe."

He glanced over at Kuro as he plucked a feather from his face, who had fallen fast asleep after being startled so violently. A soft smile formed on his face as he flipped open his trenchcoat's collar and headed out, making sure to not disturb the rest of the building's occupants.


The chief of police stood a good couple meters away from the scene of investigation, He could hear Shirou leaping the rooftops and making his way down with a thud, already holding out his respective coffee. The landing scared everyone but the chief, who was already used to this. The wolfman received the warm cup and took a gentle sip, his tail swaying from the flavor of nutmeg and cinnamon mixing with the sweet half-and-half mixed in with the coffee blend.

"I'm worried this is something that may start something if left ignored." The chief described as Shirou got closer to the scene. Surrounded by yellow tape and hazard signs stood 3 barrels, one knocked over and its contents on the ground. A teal-ish liquid already blending with the asphalt. It gave off fumes that shone in the spotlight. Fumes that made his neck fur stand on edge. Shirou turned around and took another sip to wipe the scent from his senses, sighing heavily. "I can see why you worry, this is pure chemical waste. Whoever caused this spill obviously had no intention of retrieving this. They left it here without a care in the world."

The chief looked at him with concern. "We've already gotten word from the research department, says this batch of chemicals had handling much too particular to any kind of factory, plant, or government facility. They say it contains elements of drugs used in various kinds of products and foods, moreso a very concentrated form of it to combat a specific protein. It's called uh... Umm..." He struggled to read the word in text, overlooking the specialist's added assistance of phonetic note after the message.

The wolf walked over to take a glance at the officer's phone, wondering why the text was so large. "Myostatin. It's a protein in DNA that limits muscle growth, stops the body from reaching sizes it's not supposed to." He contemplated what such a concentrated mix of that could be doing in the middle of the road. "Say, old man, Sylvasta Corp. has had no direct involvement with Anima City in months, right? This sounds like a pharmaceutical gig. If these barrels are brandless, then where did they come from?"

"About that..." The chief replied. "The guys back at HQ joked about this being a Sylvasta ploy to worm their way back into our society... But the longer we look at the situation, the less it seems like a joke." He looked over at the wolf, tense grip on his coffee and his ears back. The chief reached over and placed a gentle hand on his arm, causing him to jump and ease back into his thoughts. "Shirou, I promise this isn't Sylvasta's doing. We got rid of any and all traces of them from Anima City, business or otherwise. Any other kind of involvement here would bring direct government handling straight to their doors."

Shirou could only nod and sigh, closing his eyes and taking another sip. The first few weeks after that final showdown with the three-headed beast were sleepless nights for Shirou, nothing but doubt and worry clouding his mind. It took several weeks of meditation, gym sessions, and self-care for him to finally feel comfortable with himself and his job. Even Michiru had to stay with him temporarily to make sure he wouldn't get up in the middle of the night to investigate anything. And now he stared down thee barrels, looking for any possible trace of that wretched corporation. Any step closer to those barrels would flood his senses with the rancid smell of what seemed vaguely similar to protein shakes, those of which he tried avoiding during his gym days.

For a being that was millenia old, a select few were shocked that someone so strong had such a lithe figure. He squatted 500 lbs like it was nothing, did preacher curls with 100 lbs on each hand. He did leave the sets steamy but he was by no means exhausted. While everyone was finishing up their workouts, he was finishing the warm-up. He had maxed out every single weight and equipment on his very first day back at the gym. But with nothing to show for it.

"Myostatin, hm...? The protein shakes back at the gym prohibited any products that combated it... Those have decent results for humans, but to come into contact with a beastman?" Intrigue ate away at Shirou's mind, curiosity striking him at his most vulnerable. He wondered what else was mixed in with that leaking batch.

Shirou wordlessly set down his coffee on top of the chief's car, walking over to the closed off section with held breath. The chief didn't notice until he had already crossed the tape. "S-Shirou! What are you doing? We don't fully know what the mixture contains yet! Get out of there!" But just like before, he knew his advice had fallen on deaf ears. The wolf crouched down in front of the puddle. It spanned about two meters in length, allowing him a good distance of safe ground to get around it. The closer he got, the more pungent it became. His chest heaved once it became unbearable to breathe in, though the more he breathed in, the more he felt comfortable breathing it. It started to reek of post-workout sweat, a bodybuilder's potent odor after finishing his sets... Of his own musk when entering the locker room. He stared at this teal-colored fluid with burning curiosity. If myostatin is what limits size, should he really be this close to something that could give him his potentially true size? If it's a blend of chemicals, perhaps it's something that goes beyond one's true size...

That thought alone sparked something in him. He reached down, placing his gloved claw down onto the liquid. It was as cold as the night, yet still fuming. He brought up the dabbed liquid up to his snout, taking a whiff. Definitely reeked, but it was something he was used to already, mysteriously enough. With a curious lick, he opened his maw and dragged his tongue across his claw to properly sample the fluid. Immediately his senses are overloaded with the flavors within, unable to get a proper grasp on the source of the overwhelming sensations haunting his mouth. It had the consistency of a protein shake with the burning of cinnamon spice. But the odor... It could only be compared to a virile male finishing a couple hours worth of workouts, a strong, intense, heavily masculine scent that could make even men with the strongest of wills freeze in their tracks. It was less harmful than he expected and it egged him on to scoop up some more and drag it along his tongue.

Immediately, he stiffened. His body tensed up as he groans, struggling to think about why he's reacting this way. A low growl escapes his maw as his breathing picks up, his body heat starting to rise slowly. "Whatever I just consumed", he thought to himself, "Is it already taking effect?!" The rising worry from this reaction left Shirou's heart pounding, worried he just locked himself into an inescapable situation. His logical sense told him to seek help immediately, but some darker part of his mind told him to keep going, to take some more and see how far this reaction would go. Yuji stared at him from a distance, scared of what the crew has just stumbled upon, as well as whatever in the blazes Shirou was thinking.

"S-Shirou, anything at all? I get you're strong and all but why would you just consume random chemi-" The officer froze upon noticing the fur on Shirou's neck standing on edge and his arms trembling. Before he could prod further, the wolf clutched his stomach in anguish, loud gurgling coming from it. The dog could hear it from where he stood, looking over at the coffee Shirou put down and wondering if he put too much sugar.

"...C-Chief... Get this substance cleared up... I-immediately, before anyone else..." The wolf was not able to finish his sentence before he let out another pained groan, his gloved hands on the ground and making a splash in the fluid. He shook and failed to catch his breath, his limbs feeling like they were melting. He sought to take off his trenchcoat before he overheat on the spot, and that's when he noticed it fit him. It wasn't snug, it was tight. He could see the outline of his arms, the separating muscles in them. It wasn't that the coat shrunk, but that he grew.

He took a panicked glance at the puddle on the ground, realizing that from just a single sample of the stuff he was able to grow some definition. He reached up to his stomach and could feel solid muscle, his abs almost as hard as steel as he rubbed over them with the stained glove. Shirou was panting and heaving, unable to comprehend this reaction. Was this really what everyone was telling him about? The ability to portray strength from just appearance alone? His thoughts were like a swarm of flies, unable to stay in one place, except there was one thought that screamed at him, what was once in the back of his mind now slowly becoming more prominent. More.

A sharp look at the sealed barrel next to the one that had tipped over and from the spotlight's angle, he could see it was still full. He struggled to stand, shaking and uneasy. The chief noticed that his skinny jeans were no longer slim, curious as to whether or not Shirou had been as muscular a while ago. Nobody in the area could anticipate him rushing over to the barrel and punching a hole in the top. It's not like anyone could stop him from reaching in and cupping the fluid in his hands, bringing it up to his maw and taking gulps at a time. The cold, steaming viscous drink traveled down his throat, spilling down his arms and neck, leaving him panting steam. The gurgling got louder as he took a step back, letting out a pained roar. His muscles burned and ached like he had just sprinted across the country, making him tense up and flex. His swelling torso poked through his black shirt, his toned pecs and chiseled abs being visible from the spotlight that was targeted at the barrels. From inside the trenchcoat, the sleeves of his shirt proved an obstacle, his growing biceps and triceps growing past them. The ripping of cloth filled the quiet night air, the other cops staring in sheer fright and awe from what was happening to the wolf.

The full moon shone down on the Silver Wolf as he grew in pain and pleasure. Shirou let out another groan, his tongue rolling out of his maw as steam escaped him like a chimney, his trenchcoat starting to prove difficult to keep on as he gained another 50 pounds of muscle within several minutes. His fur began to stick to him as the sweat of this growth collected onto his clothes, resulting in him being as steamy as the fluid in the barrels. He could feel his chest barreling outwards, making it hard to breathe and keep up with this growth, part of his black jeans tearing from the seams due to his thickening legs. He looked over at his arm, bringing it up to the light and flexing that veiny bicep, the tearing of the fabric sending shivers down his spine. If this is what it was like to have a body that matched the strength, he needed more. Grabbing the rim of the barrel, he lifted it up and placed his maw at the giant dent he made, taking heavy gulps of the heavy liquid. He could only swallow around 7 mouthfuls before he had to place the barrel back down to catch his breath. His insides were on fire, his body felt like it was about to explode. There was more energy coursing through him than he felt in his true form.

"Shirou! What's gotten into you?! I'm calling the paramedics, this is not safe! You're... Growing from this thing?" Yuji held his radio, on the verge of calling an ambulance over to investigate what kind of reaction Shirou was having to the liquid. It scared him as much as it intrigued him. "Reminds me of my younger days...", he said to himself.

The wolf turned towards him, snarling. "Don't you move, Yuji." The cold, hungry look made his blood freeze. The other cops began to walk away or hide in their patrol cars, leaving just them two on the scene. As the liquid began digesting, Shirou clutched his gut once more as the sensation returned. It was like his body was attacking the effect, it wasn't meant to be digested by commonfolk. It's almost like it was meant for him alone. And that thought only made him want more of the juice. Something snapped inside of him. He didn't care about the repercussions, he didn't care about where this could've come from, he didn't care about the fact that everyone else was staring at him, and he especially didn't care that his clothes were straining, holding on for dear life. Sweat ran down his body, each passing second an extra couple pounds of muscle added on to his growing mass. Steam filled the cold night air, the dog finally catching a whiff of the wolf's intense musk, having to back away and shield his nose, but he just couldn't look away from the spectacle of the groaning, growling, growing wolf. This is a whole other side of him, one he thought never existed. But watching Shirou arch his back as he flexed and tensed up, his biceps tearing through that trenchcoat, raising his arms and taking in his own heavily masculine scent, his meaty fluffy chest tearing through the shirt without any assistance, he couldn't help but huff in shock.

That's when he saw it, Shirou's massive erection. Yuji could only imagine the amount of stimulation he was going through, but to be sporting such a throbbing length out in the open takes another set of balls. He didn't even have it in him to report for public indecency... Not like there was anything he could do to this beast.

Shirou raised his maw to the sky, letting out an airbursting howl, fully breaking the minds of the surrounding cops who were already entranced with the show. It wasn't a howl like the one that saved the city months ago, but of dominance, claiming territory, warning anyone else who dares approach. The strain on his body was beyond his own experience, veins surrounded his arms and legs, the only covering on him being mere shreds of what he was wearing just 10 minutes ago. Much less of it now that he raised his arms and struck a double bicep pose, grunting from the pressure of his skin fighting against such dense muscle underneath. The peak of those biceps grazed his fists, his lats stretching the coat to its limits. He was sure that he'd turn into that wretched beast he lost himself to if it wasn't for Michiru's help, yet his head was still full of echoes and static, no coherent thought forming except for the repetitive demands of an unknown deep hunger. More, MORE!

All Shirou could do was flex and groan, his body swelling past what he could have ever expected. Cracks formed where his feet touched the ground, his weight exceeding what the asphalt can handle. He pressed his paws into his own pecs, so overly sensitive that the slightest touch made him growl and moan, his cock threatening to burst through the elastic of his underwear due to the rest of his pants being in pieces. A puddle of sweat and precum fought against the puddle of growth fluid. The wolf's body was still fighting against the effects, burning and aching as his muscles expanded, bloated, and swelled beyond their original limits. Finally, a body that matched his strength as the thousand year old Silver Wolf. No more being underestimated by any opposing enemy, no more being critiqued for his skinny size. He can finally lift what he wanted without being stared at in shock. Though, not like a massive hulking mountain like him would avoid getting looks like that now, if anything it would be more common. But he didn't care, because his strength surpassed anything he knew. Shirou began to think of his past enemies, the monstrous Rhino amalgamation, the Horse beast, several hordes of men rushing him at once... So many people he could destroy within mere seconds if they appeared now.

His eyes widened and his breath caught in his throat. "Alan..."

The memories, the flashbacks of his life-threatening battle with the fraud of an animal. He's been suppressing and getting over the emotions of that interaction throughout his recovery period. And just when he was finally getting over it, the anger coursing through him pushed him over the edge. He stared down at the final barrel, snarling and reaching down, slamming his claws down into it, tearing the top of it off like paper. With a strong shaking hand, he lifted the barrel up and placed it near his maw, gulping down gallons at a time.

Yuji stared in fear, wondering what suddenly came over him and why he would suddenly start consuming the last barrel. "Shirou, what are you doing?! Stop, we need those for evidence!" He trembled in his dress shoes, slowly backing up as he felt the quaking of the ground from each step the mountain of a wolf took. Shirou had grown past the reach of the spotlight's shine, anything above his triceps shrouded in the night sky. The chief got a good view of his back, it was like a topographic map, with so much depth and muscles crashing against each other. He was already used to the musk surrounding the area, but just watching where it was coming from and seeing how much worse the situation got, he couldn't help but realize a little too late that he himself had gotten hard. Shirou's pheromones from that manly musk invading his sense made him hold the side of the car in anguish trying to hide that hard-on from any potential onlookers that would tell everyone else at HQ.

After taking the final few gulps of the liquid, Shirou effortlessly tossed the barrel to the side, a dent forming on the side it fell on. An echoing burp escaped his chest as he groaned and cringed inwards, his whole body pulsing and trembling. "Oh... Oh gosh... Oh yes... YES!" The final bits of clothing hiding absolutely nothing started to tear off, now revealing an adonis of a beast. Shirou was surrounded in sculpted, throbbing beef, the cracks in the ground now becoming craters as he repositioned himself to properly handle the size. He looked down, barely able to see past those meaty shelves. He reached up and grabbed them, relishing in the sensation of such masculine muscle, feeling how they heaved with his breath and tensed with the slightest of movement. A gentle press into them made him moan deeply, his massive length finally springing free from the last bits of cloth holding it back. It swayed freely in the air, almost reaching past his own pecs, jetting precum a couple meters away from the tip. It was as big as one of the cop cars and in the back of his mind he wondered if he could spear it through. He could feel each vein throbbing through that drenched fur, his own scent driving him down a path to ferality. "Finally," he thought, "nothing can stand against me." A trail of drool had marked his neck and chest, spilled from his evolution process. The drug that was meant to hold back his myostatin had now since erased any trace of it from his body. "Nothing is an obstacle to me...", he said out loud, causing Yuji to perk up. "NOT EVEN HIM!" He roared into the night sky, such force pushing the air back and the volume making glass quake. The chief sat in silence wondering what he meant by that, then the revelation struck him hard. "Oh god... That's what this is about?! Shirou, he's not eve-"

He didn't get to finish, another reverberating growl escaped from the beast as he burps, his body so full of the fluid that it can hardly process anything else. Any slight movement turned into a strain of any muscle in the limb, veins protruding and nudging around his fibers. Throughout the years, he's never seen so much anatomy in the body of an animal, and now he was the peak of male physical appearance, the pleasure he got from the stretching of his body with each movement making him groan. His cock throbbed harder and angrier with each passing second, his balls swaying between his knees. His knot was thick and one would assume it had already flared due to how bulbous it was. He could barely reach down to touch it, it has been a while since he had relieved himself, but he knew he was already big down there in his normal size. No... This is the new normal for him, and he knew it too well. The more he stroked his own ego, the faster he stroked his cock, paws tight on that solid rod, each rub causing another gush of pre to splash onto the street. The steam in the area got more and more dense as he continued giving off his backed up excitement. The feeling of strength, limitless potential, knowing that nobody would even dare try to stop him, and even if they tried he would deal with them in mere seconds. "This," he thought, "is the body fitting of a-"

"Shirou, please stop wacking it in the middle of the street. At least wait for the squad to go back to HQ... Or a walk-in therapy session." Yuji called out from inside his car, the AC turned on max and barely able to fight against the dense musk. Shirou, despite being overwhelmed with his own musk, could smell Yuji's excitement and self-pleasure within the confines of his car, grinning with a snarl. He nods and gives one last full body flex as he howls, the strain in his cock causing him to finally reach that climax he was seeking, tankloads of that deity's seed spraying down the street, at least 10 gallons per shot flooding it like a river. His balls contracted and jumped around as Shirou desperately thrusted his hips into his hands, clenching on that knot and letting out another strained roar, his production increasing in rate. He pulled his cock in with one hand from underneath, wanting to taste his own output. His loads shot straight up, hitting the streetlight and raining down on himself, coating him in more steamy fluids than just his sweat. He opened wide and drank down whatever he could catch, eagerly gulping down his own virility, licking his lips with enjoyment. That orgasm didn't have any sign of letting up soon. And while this orgasm was still going, and the sensation of his groin still active and pumping, he felt like a test run was in order. With a body of this size and strength like this, he couldn't wait to be off break.


He looked over at Yuji's car, gripping his cock extra hard with a grin as it jetted out another couple loads. Yuji stared in pure fear, watching that beast eye him down and knowing just how mischievous that grin was. "Y-you listen here, mister! I don't want you getting any ideas! Keep me and the squad out of this!" Whatever he was yelling, it fell on deaf ears as Shirou took a mighty earth-rumbling step forward, the beast taking a proud stride as each movement made every muscle of his pulse and stretch him out. It was almost a spectacle in itself, like his muscles were only focused on getting bigger from this point on. Not to mention the tip of his length rubbing between those beefy shelves of his, making a mess of his chest fluff. Any remaining tatters of his clothes had long since fallen off due to the movement. Now his full body was on display, that teal grey two-tone fur matted in sweat and cum, barely covering at least 600 pounds of muscle surrounded by veins and stacked on top of other muscle. Each slight movement was a flex, straining every part of him. And he loved the feeling, his ego as big as he was. Yuji could only watch as Shirou stood before the car, the top of it only reaching his waist. "I'd suggest scrambling before you get impaled with it." The investigator's mouth was agape at the suggestion. "Shirou, if you're doing what I think you're doing, you'll be in big trouble! Not only is it property damage, you're violati- HEY!"

Without a care in the world, the wolf grabbed the front of the car and tilted it, forcing the cop out of the car and pulled it in closer to himself. The old man scrambled to the safety of the sidewalk, ignoring the spilled coffee on the ground. He watched the titan compare his length to the size of the car, watching him reel back with a growl before ramming it straight through both windshields. This was beyond uncharacteristic of the wolf he's known for so long, but he knew that regardless of what's become of him, there was nothing he could do to stop him. Especially when it involved using his patrol car as a fleshlight.

Gripping the car's sides and leaving dents, he huffed and grunted while pounding away, the cracking and shattering of metal and glass echoing through the night, his body more than immune to the possible damage one would receive by pulling a stunt like this. And it's not like he cared, not like the car already had an outline of his cock formed into it, filling with his cum and straining with each thrust of that animalistic fury. It bent and reshaped to the will of the wolf, subject to the pleasure Shirou desired; to be truly impervious to anything in his way.

At this point, Yuji accepted that this was beyond his care. He didn't want to call Special Forces in, not at this time nor for this matter. But if something wasn't done soon, other people would get involved, and if this is how he was being treated, imagine anyone lesser than him. For the slightest moment, he took a glance at the little bit of fluid in those barrels, wondering if- "No!", Yuji thought. "I'm not stooping down to his level. Besides, not like I could even match that size and strength... But if I could..." The mere thought made his own erection throb harder, and throughout the madness, Shirou slowed his thrusting as he could smell the need coming off of Yuji. "Holding it in? If I'm entertaining you that much, might as well join me." That baritone, booming voice left shivers down his spine. He was an ant compared to Shirou, no longer seeing him as the partner he was a while ago. This was a monster beyond anyone's control. But it was an enticing offer for sure. The old man looked down at his throbbing length, a very visible tent forming from his pants, leaking and all. He never thought he'd be so aroused at the sight of a huge man exerting his power to anyone watching, though he knew it was because of Shirou's immensely masculine musk, so enticing and heavy it clouded anything in his mind and made him desire more of it. And the wolf knew it, he knew it so well he raised his arm and flexed, drops of sweat trickling down his side and falling to the ground. He was a steaming powerhouse, so desirable to any being that was near him. Yuji let out a restrained moan as Shirou dug his own muzzle into that damp rainforest of a pit and licked up his own sweat, his cock throbbing harder and growing enough to snap the remaining bits of metal that was holding the toy together. "Ah... What a mighty scent, shame my toy broke so soon. Seems I'll have to find another willing toy to take care of me, hm?~ Or would you rather I find something else this city has to offer?~"

Yuji stared at the hulking beast, he could have sworn that what little he was able to see past those heaving pecs at the wolf's glowing eyes. The energy coursing through him was enough to border his Silver Wolf form, and if he was to deny the Silver Wolf what he requested, then what did that make him? The very question putting him into a moral dilemma as he watched that monumental pillar he called a cock throb and sway freely in the air, making a puddle of cum below where it hung. The scent, the viscosity, and he could just imagine the taste... It drilled into his head, making him remember his younger years, surrounded by buff jocks after a college baseball game, covered in the seed of various musky muscular men of various sizes and species. At that moment, he dropped to his knees, his tent throbbing harder and his own stream of pre trickling down his leg and pants. Though it looked more like a raindrop compared to Shirou's massive output; just breathing was enough for him to pump gallons into the open air. The dog stared at the puddle on the ground, feeling the same as Shirou did when he inspected that growth fluid. He got down on his hands and knees, staring at the ground and processing what this night has been. Shirou stared at him with an egotistical grin, feeling like he's finally getting the public praise he deserved and filling with pride, his arms raising and releasing a powerful flex with a grunt. Veins traced along his massive arms, sweat dripping off of them. His forearm alone could crush a soda can.

The investigator caught a glimpse of the flex and the sight alone almost made him reach climax, wanting to get so close to that himself, wanting to have that kind of size in his hands, just wanting that size... He desired that size. His mind began to cloud and his thoughts got lost to and from their source. He glared down at Shirou's puddle of cum, reaching his hand in that steaming fluid and imagining just how virile the man before him was.

"...J-just like old times..."

He took a heavy whiff of what he held, quivering as his grip on reality wavered, no longer able to form a cohesive, professional thought. His partners stared at him from the sidelines, away from all the chaos in their own patrol cars, but he didn't know and didn't seem to care either. He felt right at home, and he wanted to feel more. Gently but with eager intent, he reached up and took a sip of that salty, viscous cum Shirou had produced in mass, letting it run down his throat and arms, memories of his past of servicing bigger men flooding his mind as he gulped away. Shirou's cum had so much taste in it, and he wasn't sure but thought he could feel energy coursing through him with each gulp he drank. He wiped his maw and sat there panting, wondering what he looked like to the common eye. "A proper whore, that's what you look like, Yuji...~", said the imposing wolf staring down at him. The dog couldn't bear to look at his eyes, knowing he'd fall into direct submission if he even glanced at them. The only one who knew of his history was Shirou, and here he was giving him a flash of the past. "P-Please... M-more..."

Shirou's ear flicked. "Oh? What was that?" The investigator held his maw, flush red with embarrassment, the heat of his body starting to rise as his cock began to throb angrily. "I-I..." The beast stomped his paw on the ground, cracks almost leading up to him. "Louder, toy." With a whimper, he quivered and looked up at the wolf deity. "...M-more... G-give me more of... Of your glorious seed..." There was no response, no movement.

"...Silver Wolf... Beast among beastmen."

In an instant, the wolf growled and howled, gripping his shaft and the bulging knot he sported shamelessly as torrents of what the old man desired began to rain on him, covering him in that dense output to what seemed like no end. And all he could do underneath all of that was consume, almost breathing it in. He felt right at home, being doused in the seed of a real man, relishing it all. He could feel himself feeling more invigorated, his clothes sticking to him and being drowned in all this cum making him feel ecstatic. He felt like he himself was cumming from the situation alone, his cock uncomfortably tight in his pants. He was too busy taking gulps at a time to realize that his clothes were not only sticking to him because he was wet, but because he couldn't fit into them. His dress shirt began to tear, his coat unable to reach the buttons. His belt snapped as his length started to snake down his leg, in which his legs were thickening enough to test the seams of the pants that desperately tried to hold him back. Each gulp led to another burst of his growth, a gut forming in his midsection that bordered between abs and swelling. Yuji could feel himself growing for sure, not just in size but as a person, finally being who he was meant to be, a cumdump. And the realization alone made him let out a howl of glee, flexing tight and shredding off his sleeves and pants, his chest beginning to swell and adding to the mix of cum and sweat running down his body as milk leaked out of his nipples. Shirou watched in stoic awe as the old man, once up to his knee, was now up to his waist. By the looks of it, he had probably gained an extra 200 pounds of muscle, each bulging limb struggling to contain all of that heft. While Shirou had a leaner, more strength-centered build, Yuji was on the denser side, smooth built muscle adding on to his frame like nothing. He grew in height, his shoes and pants no longer able to hold in his lower half as the coat hung off his back due to the lack of sleeves, properly showing off those slick, veiny, hairy arms. The more he tried to move, the more they tensed, each muscle fiber in his arm fighting for space. He couldn't believe what he was seeing, what he was feeling.

The dog reached up to his own meaty shelf, moaning in ecstasy immediately upon contact as milk gushed out of his solid nipples, feeling them start to thicken up as well in no time. No longer buried underneath all that weight of Shirou's loads, he reached up and crawled over to that swaying rod, digging his face deep between the crevice of those monster truck tire-sized balls, unable to believe that he was given the privilege of taking a whiff straight from the source. With a greedy lungful, he inhaled that powerful scent, his cock springing free from its own cloth prison, tearing off the rest of what remained of his pants. Shivers ran through his body, nerves unable to control themselves as he moaned with each passing second, growth still affecting his body when one more whiff of the scent of a real man sent him past his limit, climaxing all over Shirou's fluffy sack. It was nothing compared to him, nothing would ever be. Not his size, not his output, not even his scent, no, it was washed away long ago as he bathed in the wolf's cum.

"You better clean that up, toy. Not a drop missed." Yuji looked up at the voice, trembling in fear and ecstasy. "...Y-yes... Sir..." He lowered himself and dragged his greedy tongue across the surface of his balls, each bud of his tongue getting to savor the taste of his combined cum with Shirou's as well as the sweat he's been bearing for so long. He would never forget the taste, the smell, he knew it was a treasure. This essence, he thought, will be treasured forever.

He could feel every inch of his body stretching and melting to bond stronger in mere seconds, a burning sensation numbed by the intense testosterone-heavy musk the Silver Wolf had to offer. He held those heavy balls in his paws, his arms tensing and his clothes continuing to tear off just to lift them up to test the heft. He could hear the sloshing and groaning inside them from Shirou's continuous orgasm, the surplus of loads he had to offer spewing behind the dog.Yuji had his torso exposed, his lats widening with each breath as his back began to form valley after valley of muscle, all while his delts began to consume the space he had in his neck. His shoulders bulked to the point where the sleeves could no longer handle the pressure, his thickening biceps and triceps tearing off the fabric that desperately clung to his skin while veins made themselves present all along them. His pecs fought against said biceps, the straining causing them to flex and his thickened nipples leaking and spraying milk with each pulse of his body, all while they lay on his stomach. Due to the mass amounts of cum he consumed during that growth session, the investigator had quite a gut, swaying with each slight movement he made from the intense growth. His rear had thickened tremendously, almost made to look as plump as possible to perfectly show off his capabilities of servicing a deity like Shirou. Yuji's cock and balls hadn't experienced the growth as strongly as Shirou did, but he still came as frequently, overloaded with pleasure,