A father's present

Story by Nayar Leng on SoFurry

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Hello, guys, it's been a long since I wrote something, I've been busy writing other stuff (science stuff for work) but I finally have some free time to write something for myself (and yours of course). So here we have a story to celebrate both father's day (delayed) and pride month. I most warn this is a human tf muscle growth and weight gaining story, the tags for bear and puppy are to reference these subcultures of the real world, not animals. Once said, let's talk about the story.

John, a middle age man with a college son, finds a strange package in front of his door, it has no remitee, but it's addressed to him and his son. When he opens it he's startled by its content, he can't predict what is about to happen to him, his son and his neighbors later after he put on the leather cap.


John looked awkwardly at the box that lied before him in front of his house’ door. It was a simple ordinary box made of cardboard, one of those that are employed to pack packages and sent to people, except that this one did not have the remittent written, only the addressees: he and his son. The middle age man found it quite strange, for both of them had not many friends and most of them lived near to the neighborhood or they saw them at work or college. Nevertheless, he drew the keys from the pockets, opened the door, picked up the box and walked in, putting the item on a table in order to look for a paper cutter or scissors to open it.

He found what he was looking for in one of the kitchen’s drawers, so he went back in an instant to the living room where the box was placed and immediately he cut the tape which sealed the lids, what he found in the interior left him even more perplexed: a leather cap, a dog mask plus a couple of attires made of the same material as well, of those he had seen a couple of time that were usually depicted in BDSM material, only that these were meant to be used by men.

“What the hell!” John exclaimed, even though no one except him was there to hear him “What kind of bad joke is this?”

He found, however, in the moment he was about to throw everything to the trashcan, one note. Resisting the impulse to throw the box, he stopped and went to sit in the sofa so he can read what it was written, perhaps the entire situation could be clarified.

“Wear me” were the only words written in it. John felt irate, throwing the box with its content to the floor, cap rolled some steps until it stopped before him as if it was challenging him, to dare him to obey what it was written in the note.

John managed to calm down gradually. Why was he so upset? It was just some “clothes”, there was nothing wrong about wearing them after all, wasn’t it? He thought.

“Yeah, why not” he said aloud “Just the cap” then he went where the leather cap was resting, picked it up and put it on over his head.

“Hey, it isn’t that bad” John admitted after checking his image on the mirror which was in the living room. He even thought he looked a little tougher with it on. But when he was about to take it off an intense headache stopped him. It was so strong he fell to the floor.

“Fuck!” he screamed, the pain was ridiculously insane, it was like hundreds of electric shocks were shot into his skull and then spread across the body endlessly. John writhed over the floor, trying to take the cap off, for he was certain that what was happening was because of it, but it seemed to be impossible: the evil attire looked like to be stuck to his head with the most powerful glue.

Then he stopped, it was not because of the electric shocks have stopped, but for the images that began to appear in his thoughts. John started to see men almost naked, only with clothes resembling those he found inside the box or even less, with their penises exposed, whether they were hanging or in the middle of an erection, some were even leaking. John felt a wave of repulsion, he was not gay or bisexual, he had dated dozens of girls before and he even married with the mother of his son, who sadly had passed away when he was still a kid. Since then, he had not met another woman.

“That’s because you are gay” John heard a voice that came from inside his mind.

“That’s not true!” he replied back “It was because I was too busy racing Max”.

“Bullshit” the voice laughed, John noticed, terrified, how that voice resembled his “It was because you were weak. You were afraid of what people would say”.

“Lie!” He roared “I’ve never been uncertain about myself…”

“Sure, you’re not” the voice hissed like a snake, crawling around his mind that was already tired for struggling against the shocks “You just need a little push into the right direction and that’s what I’m gonna do”.

The images increased. John was not only watching images of big… were they called bears or something? Strong, hairy men, but also some with clean skin, yet muscular, whose faces were covered by dog masks puppies?

“You’re enjoying them, don’t you?” the voice mocked “Come on, man, look at those hot guys, big, virile, with fat and juicy cocks”

His own penis was betraying him at that moment, for he felt how his pants’ fabric tented a little.

“Stop!” John screamed “This is not me; you’re playing with my head, you’re twisting it!”

“No, I’m not” The voice denied “I’m just bringing your true self to surface”.

John kept fighting, but the pressure under his pants grew larger.

“Come one, man, don’t be a dick!” But the voice continued as well, this time it used John’s own memories to his favor, creating tiny cracks in his mind walls “A man’s ass is not too different from a woman’s… maybe tighter. Do you remember those times you fucked girls from their asses back in college? Now add some hairs in the outside that could increase stimulation”

John’s cock went rock hard with those last words, he remembered to enjoy that position back in those days, to have his partner under total control… wait, why did he say partner and not girl?

“Cause you like guys too, idiot!” the voice… his own voice laughed maliciously after watching how the bricks of the mind’s wall fell one by one “Women are good, but imagine doing it with another guy, both think and feel very similar, wouldn’t the pleasure be greater?

John could not think clearly by then, he was feeling hot, not only due to the erection under his pants, he was sweating as well.

“Wouldn’t it feel awesome that your fat cock was sucked by a younger or more submissive male right now? How about a titsjob? I bet the sensation is marvelous, with your boyfriend covered in sweat and his chest with body hair, with big pectorals…”

John could not hold the moan that escaped his throat, sweat had made big stains under the armpits and his chest, while pre did the same to his pants.

“See?” the last brick fell, so the corrupting wave flooded John’s mind, twisting his ideas, memories, desires to create a new personality “I told you that you were gay”.

“Yeah, you’re right, I just hid it” John admitted between moans and grunts.

“No prob, bro, that’s gonna change from this moment” John’s voice said “We’re gonna reshape you to your true self”.

“Reshape me?” John questioned.

“Yeah, we’re gonna turn into a hot daddy bear: big, muscular, hairy” The voice answered.

“Fuuuck!” John exclaimed, the idea of looking like those images he saw some minutes ago in his head drove him crazy, but he felt it was right, he was 45 years old after all and with a true son.

The changes began in an instant. A warm wave spread across his body, the body hair he had over his torso and arms thickened and increased; first, the middle line that went from his crotch to his chest joined in one, for he had only a little patch of hair in the sternum and a fine line that grew in the middle of his abdomen, but the new influx of testosterone that coursed through his body altered it. Then, the patch of his chest spread to both sides, covering the pectorals with a carpet of dark hair. His jaw was next, it started with a light shade, but it gradually became darker as hair elongated and thickened until a full beard covered his face, while its tips touched his chest.

“Look at you! You’re already looking like a real man” the voice flattered him.

“Fuck, yeah” agreed John, whose voice, which used to be a baritone, had dropped into a bass.

“Let’s put some mass, shall we?” Suggested the voice. It did not take long until John felt his clothes tighter. His chest swelled with each breath, shoulders widened to both sides, while biceps as well as triceps’ girth increased.

“Yeah, more!” John roared with pleasure, the buttons of his work shirt struggled with the growing chest and bigger back, sleeves constricted the stronger arms. The upcoming bear felt some discomfort as his body outgrew the size of his clothes, but he also felt amazing for watching the changes and how incredibly hot he was turning.

Finally, one of the buttons jumped from the shirt, incapable of holding both sides together over the mounds that were growing beneath, then another and another, until none was left. Tearing began to appear in the junctures of both shirt and pants. John could not avoid flexing his own body to help it tear into pieces. He felt powerful, more than he ever did in his entire life, he was now in charge, a real alpha.

The final touches of his transformation were his abdomen and legs. John, contrary to other men of his age, had no belly, he did not have visible abs, but his belly was completely flat. Once the muscles of arms, chest and back were fully formed, layers and layers of fat were deposited over his midsection, gradually enlarging it, rounding it. Then his lower limbs had to catch what it had happened to the upper body, so it did not take too much until they grew enough to sustain the weight over them. Scattered gray and white hairs grew as well in his beard, hair and chest, to emphasize his middle age.

“Fuuuck!” John roared again, this time with a shot of cum that splatted over the mirror in front of him, his cock had been freed from its encaging when his pants and trousers were destroyed by the growth of the legs and genitals. The transformation was completed, he had properly turned into a bear, so large and massive that other men would fear him o even desire him.

“I’m so fucking hot” John claimed as he took a careful look at himself, his hands exploring his new body to its full extent “And I’ll look even hotter in leather. Heh, I can’t wait to see what Max is gonna say when he finds me”

The new bear drew out the clothes from the box, as well as the puppy mask. He knew that if he put it over his son’s face he would turn into a hot gay puppy, happy to serve a daddy bear and dominate other men less dominant than himself.

Max found odd not to see his father when he arrived home from college, he was usually there by that time, in the case he was late, he would have texted him to warn him in advance, but his mailbox was empty.

“Dad?” he called, hoping he was in the bathroom or somewhere else, yet only silence replied. He decided to give him a phone call, once he dialed his father’s number he waited until it began to rang, that was the moment he stopped frozen in the middle of the living room. His father’s phone was ringing, Max could hear its distinctive tone, he approached slowly to the place it seemed to come from, following its sound. The phone lied over the floor, next to the table, covered by shreds of clothes. The college student moved closer to have a better look, on the table rested an open cardboard box, its content was missing; before him, the mirror was splatted with a viscous white substance, which looked a lot to some fluids he could also produce.

“What the hell happened…” Max did not finish the sentence, for a big hairy hand shut his mouth and pulled him back to one of the room’s corners. His back was pushed to what it seemed to be a hairy chest, crossed by some leather strands. He tried to move, but the attacker was way too strong.

“Easy, boy, this won’t take too long” a deep unknown voice whispered into his ears. One arm locked around his chest, stopping him from escaping, while, with the free hand, the attacker was trying to put something on his face.

“Let me go!” Max yelled once his mouth was free from that hairy hand, yet a mask was being put over his face. It smelled like a leather mask. The man pushed him to the floor, then put a knee over his back to keep him locked, while tiding the mask to Max’s head.

“Who are you, and what did you do to my father?” The boy asked once he was released by the man who just stayed in his place, watching him with a grin

“Heh, don’t you recognize your dad?” the man replied.

“There’s no way you’re my dad” Max denied “You’re way too…”

“Big, hot, sexy, masculine?” the man that claimed to be his father completed the boy’s statement “I know kid, a lot has happened to me some minutes before you came, but I assure you, I’m your dad. Take a closer look if you want to confirm it”.

Max did as he said, he looked carefully at that man from head to toes over and over, to his concern, it looked like he was saying the truth, even with all that hair, muscles and fat, he looked like his father, but he could not believe it.

“It’s not possible!” he denied “You’re just some pervert that sneaked into our house, I’m going to call the police and…”

Max screamed without finishing the sentence and fell to the floor, his head was in pain, he could barely move.

“You’re feeling it, aren’t you?” the man who claimed to be his dad questioned him “Don’t worry, it’ll be over soon and you’ll feel better”.

“What the hell is this? Argh!” Max roared in pain “Does it come from the mask? I’m going to take it…” Max tried to untied the mask, but that man stopped him by grabbing his hands, even though he was heavy, he looked to be very fast.

“No, son, you can’t do that” the man said “I really don’t know what these things are, but I can assure you that when it’s over you’re gonna turn into a hot puppy at least, just like I became a bear with this cap I’m wearing”.

Max used all his strengths to set himself free from John, but his father had become so strong it was futile, furthermore, the electric waves that traveled through his body and fried his brain let him exhausted, dizzy, unable to look for a way to escape. But when he thought it could not be worse, a series of images began to materialize inside his head.

“What’s going on with me, why am I seeing these nauseous images?” Max mumbled.

“Heh” John laughed, still holding his son tight “It’s starting. Don’t worry son, it’s just showing what you really like”.

“Nonsense!” Max screamed, disgusted for the mere idea “I’m not gay”.

“Oh, son, I think you’re even gayer than me” His father whispered to his ears, his breath was warm “I’ve never seen you with a girlfriend before”.

“That…” it took a time for him to elaborate a good answer, at least for him “doesn’t mean anything, I’m just not too popular”.

“Bullshit, you’re just a coward. But don’t worry, I was just the same. Once this is over you will feel awesome”.

Max just growled for an answer, but the images continued to appear inside his mind and they were getting spicier, daring.

“Wouldn’t it be that you rather like not to be the one who does the first step?” John inquired, still whispering those words with that low tone “Maybe you like someone else be in CHARGE” he emphasized that last word. Max let escape a low moan when he heard that word.

“Ha!” John exclaimed “I knew it! You rather like to be dominated by a bigger man, don’t you. It’s ok son, ancient Greeks were the same, as long as the boy didn’t grow a beard, they should obey and be taught by older men”.

Max did not want to accept it, but those ideas sounded hot, being dominated by somebody else, one of those big bear men, just like his daddy.

“It doesn’t mean you’re less man than others, you’re still a puppy after all, and you can still dominate someone who’s less dominant than you” John continued. Max’s head was a chaos, his older self tried to hold as long as possible, but the attack was now from both sides: from the mask and his daddy, with the attackers gaining more and more terrain “I can’t wait to see you turn into a muscular puppy with a hot six pack”.

“Muscular puppy?” the picture of himself being muscular and covered in leather with a mask looked incredibly hot. He always wanted to be muscular, but he did not have the resolution to work out to achieve it.

“Yeah, son, that’s your place for now, later you can possibly become a bear” John confirmed “You like the sound of it?”

“Yes!” Max moaned, his mind had completely been conquered by the will of the mask “I want to be a muscular puppy and then a hot big bear”.

“Don’t worry, son” John assured him “This mask will take care of everything”.

As if these words were a trigger, the waves increased their frequency, but this time Max did not feel uncomfortable, quite the opposite, they were feeling good. His temperature increased, sweat appeared over his skin, as if he had finished an intense workout routine. With every deep breath his chest grew larger and shoulders wider, the entire body was gaining pure muscular mass by the second.

“Fuck, it feels so good” Max’s voice had dropped some octaves, but not as much as John’s did, giving him a juvenile vibe, yet masculine.

“Yeah, it feels fucking good, son” John agreed, he had released his son by then, it was unnecessary to hold him as a prisoner.

Max curled up one of his fists and the sleeves of his shirt tore, his biceps made his way through it, he did the same with the other arm, then lifted both limbs, deltoids ripped the shirt as well, the young man was reaching bodybuilder standards. His skin tanned a little, barely no fat was left, so each muscle could be appreciated without problem.

“Daddy, I’m so hot” Max squeezed one of his nipples “And I’m so fucking horny”.

“What about we watch some dirty porn?” John inquired, a smirk on his face. The idea of watching porn with his father sounded even hotter, so Max moaned to confirm.

Max brought the laptop to the living room where the TV was located in order to connect both. He had already changed his clothes with the ones that were left in the box. A spike black leather necklace was around his neck, one bandage with metal spikes as well around each arm, while two bandages kept the pecs delimitated and a black jockstrap covered his now oversized genitalia.

Father and son sat on the sofa in front of the TV, which screen magnified what was displayed on the laptop’s one. Max opened the browser to search for a webpage containing what they were looking for. It did not take too long, for now his head was full with pages of the most hardcore gay porn.

“This looks promising” said the father once the video was shown on the screen with all his amplitude. It depicted a group of bears and puppies in a sex dungeon with the same amount of clothes, or even less, that they were wearing in that moment, covered in oil which highlighted their features. Shortly after they started to watch the video, both had their shaft at full mast, hands moving up and down the full lengths of their dicks, sometimes playing with their nipples to enhance the pleasure. Their moans and grunts mixed with those of the actors on the video, they controlled the speed of the masturbation, fastening it in some parts, slowing it down in others. Pre began to emanate from the urethra gradually, father and son moved their hands around the shafts to cover them as much as possible with that translucent liquid so it could improve the moment… from time to time John brought some to the tongue for tasting.

The muscles in their pelvises contracted, the urethra opened, a shot of semen was expelled from both dicks into the outside, landing on the floor, a wave of pleasure expanded across their bodies, eyes closed, mouth opened, body relaxed. Another shot came with another wave, then another and another, each one with less semen that the previous.

“Fuck!” Max managed to gather strength to speak “That was awesome”.

“Yeah, son, it was” John grunted in agreement “But I’m still horny”.

“Me too” Max admitted “Do we watch another…”

“I need real sex” John cut him “I wanna put my dick in a hole”.

“Heh, sounds fun” admitted Max “But we’re single, how do we do that? You’re not suggesting that…”

“I’m a pervert, but I have limits” John corrected his son “Call one of your friends… Michael, he has a dad too, hasn’t he?”

“Yeah, but they’re…” Max was dubious about what his father was planning.

“Not for too long” John said, a smirk was being drawn over his face. He stood up from the sofa and went to the box from where he extracted a card, then went back with his son and handed it to him “Read it”

“Spread it” Max read; the same smirk of his father appeared under the puppy mask.

Michael and his father James arrived to John and Max’ house some minutes after they had a phone call from them. It was not uncommon that their neighbors invited them to have a chat from time to time, they were close friends since both families moved to the neighborhood when the kids were not even born. They stood before the door and knocked with the characteristic rhythm they used with them, it was like a code that was invented long ago as a joke, but stuck since then. Some seconds later the door was open, the smiles on James and Michael’s faces erased to be substituted by one of concerning. They did not see their usual neighbors, but two men dressed in leather, both were big, the elder had a round belly, but he did not look unshaped at all, muscles could be seen under the layer of fat, he was hairy as well, the other one, who looked younger, was cleanly shaved and also had a muscular body, but with low fat.

“Good evening, guys” the strangers greeted them with their low tone voices. James and Michael thought they looked like their neighbors and close friends, but that was impossible.

“Heh, I guess you don’t remember us well, I can’t complain, a lot has happened in one hour” the bigger man continued “But I can assure you, we’re your old friends”.

James and his son wanted to say something, but their mouths were closed by the lips of the other two men. They struggled to get released from that kiss, but the strength of those perverts overwhelmed them. Those tongues inspected every corner of their oral cavities, played with their own ones, sucked the lips, saliva mixed. It was disgusting at first, but somehow a new feeling appeared within their minds, which began to rewrite what it was there.

“What was that?” James mumbled after the bear that claimed to be John released him from that passionate kiss, a thread of saliva still joining them.

“You liked it, didn’t you?” the bear inquired a smirk on his face.

“It was weird” James struggled to find the right words, too much conflict inside his mind to think properly “I’ve never kissed a man before…”

“Wasn’t it better than those you’re having lately?” The man continued.

“I… I don’t know” James stammered; his marriage was not going too well lately.

“I bet it’s the best you have had in a long time”.

“I think so”.

“Come on, man, let’s have a try” John suggested “Let’s have some fun, if you don’t like it you can go”.

Those words lingered in John’s mind for some seconds. He was in conflict, the inner him screamed it was wrong, but curiosity grew gradually, plus, when he took a good look at that man and the one that was still kissing his son, they did not look so abhorrent, in fact, he looked kind of attractive, both of them.

“Ok, I’ll give a try” James answered, then he kissed that man back. This kiss was different, it triggered other feelings in his head, feelings he had not felt in a long time. He grabbed one of the pecs of that man, it was big, both soft and hard due to the fine mixture of fat as well as muscle.

“You’re fast” said John “I like that, I can’t wait to see what you become”.

“What I become?” James’ face was read, his eyes, full of lust “What do you mean?”

“I bet you’re gonna turn like me, a big horny bear daddy. Do you like the idea of it?” James nodded at that statement, he wanted to look like that man, big, desirable “Let’s continue then”.

Both men continued with the play of kisses and caring, it did not take long for James to change. Unlike John before the transformation, he had some beard, it just grew longer, so it did the body hair upon his chest and arms.

“It’s so fucking hot in here” grunted James, beads of sweat accumulated over the eyebrows that grew thicker, his shirt was snugging “Gonna take this shirt off” he tore his shirt instead of what he said, showing a body just like John’s, muscular, hairy, with a round middle.

“You’re looking so fucking hot, babe” John sucked one of his nipples, James moaned “Look at your kid, he’s turning into a hot puppy just like mine did”.

James turned his head to were his son and Max were. It was true, Michael had gained so much body mass it was unrecognizable: abs and pecs flexing as his torso moved following his new lover’s rhythm, both tangled in a knot of passion.

“Babe” John called “Why don’t we fuck too, all four?”

A greedy and lustful smirk appeared over James’ face “Fucking yeah, I want to put my fuck cock into a hole, I’m so fucking horny, love”.

“Take my puppy then” John ordered “I’ll take yours if you don’t mine”

“Course not, we’re old friends after all” then both bears went with the younger males who were still kissing and touching each other and joined them too. Four bodies covered with sweat tangled with kisses, hugs, bites and scratches. The younger ones smelled the older males’ pits, while these ate their asses, then introduced their fingers to widen the rectum for the penises that would be put inside later. Puppies moaned at the stimulation of their prostate.

“Wide enough” said both bears when they introduced their cocks, which were so covered with pre that no lubricant was needed “Still tight, though” the puppies moaned in response. They were so close to each other that chose to rub their dicks.

“Fuck, this is so good” James roared as he moved back and forward into Max’s ass, the puppy moving rhythmical as well.

“Do you wanna keep doing it?” John grunted as he did the same with Michael.

“Fucking yes, this is better than my old angry wife” James replied, teasing Max’s nipples “Whadya say, son, wanna come here to live?”

“Yes, daddy” Michael moaned, the stimulation of both his prostate and cock overwhelmed him.

“Excellent”.

The four men continued: John and James were kissing each other while they fucked their step-sons, Max and Michael rubbed their shaft while rode their step-father’s cocks. It was a mixture of grunts, moaning and fluids, the four completely synchronized. Then all men exploded in one orgasm, staining the carpet of the living room (they had not moved from there) with cum, as well as their torsos or filling the recti of the puppies, dripping a little from the asses. A final change occurred to them, all four gained even more mass, Michael and Max reached professional bodybuilder’s standards, arms were as thick as their legs used to be, backs so wide it would be hard to pass through a normal door, legs so strong they could smash water-melons without effort, pecs so large it almost resembled tits. Their father did not have such a great gaining, but acquired some tattoos, a bear pawprint in one shoulder, two intertwined male symbol in the other, as well as some tribal patterns across their arms, the same patterns appeared as well in the arms of their sons.

“We’re gonna do such a great family” stated John.

“And horny” added James.

Nayar Leng