"D-Dumb Kacchan, telling me something like that," Izuku Midoriya mumbled sadly as he rushed to get his "Hero Analysis for the Future Vol. 13" notebook that had been burned and tossed in the river courtesy of Katsuki Bakugou, his resident ex-childhood friend/bully.

For 10 years of his 14-year-old life, Izuku was treated like he was worth nothing due to the lack of a quirk, something that most of the population had. This was especially true for the person Izuku always followed, a young man named Katsuki Bakugou who was praised and revered for his strong and flashy explosion quirk. Katsuki was the ring-leader of Izuku's torment, belittling him and hurting him with his quirk and constantly demeaning him with the name "Deku". This was even worse due to Izuku's desire to be a Pro-Hero like their shared idol All Might, the Number 1 Hero in Japan. Izuku wanted to be a hero despite his lack of quirk, and this angered Katsuki to no end, even more so when it was announced by their callous teacher that Izuku wished to apply to UA too. In response, Katsuki burned his precious notebook and tossed it in the river, and that was where we find Izuku now.

"W-What if I actually did it," Izuku muttered to himself, trying hard to wipe the tears from his eyes. He spotted his notebook which had washed ashore. He quickly raced over and grabbed it. "Man, it's all soaked and burned. Hopefully nothing is too bad-huh?" Izuku noticed something had been under his notebook.

It was a strange device with a light blue metal casing resembling a 'plus', a purple ring around the center, and a small black screen.

"What's this?" Izuku said as he reached down and picked up the device. He looked it over, trying to figure out what it was. To his surprise, as soon as he brought it up to his face, the screen lit up and the device beeped. Before he could question further, an electric shock surged onto his hand. "OW!" he yelped, dropping the device and his notebook to the ground. He rubbed his hands to ease the pain of the shock.

Little did he know that shock would change him forever.

Thinking nothing of it, Izuku continued on his sad lonely track home clutching his notebook to his chest after pocketing the device figuring he could find out who it belonged to and return it to them. As he was walking, he was completely unaware of the fact that behind him rising from the sewer was a large moving gelatinous looking sludge, it was a wiggling and moving mass of sludge that had a pair of eyes rolling around inside of it as they moved and rolled around freely before spotting Izuku and the slime seemed to form a mouth as it gave a rather nasty looking grin.

"Well well, a nice looking invisibility cloak." The sludge spoke as from its body a mass of wriggling, tentacles of slime began rising from its body aching like snakes ready to strike. "You'll do nicely!" The tentacles shot towards the back of the unsuspecting green haired teen before it was too late and one coiled around his waist, another around his neck gagging him and four more around his arms and legs dragging him back into the mass of sludge that began crackling. "Oh yeah, just keep struggling Kid." The obvious villain crackled as a lager tentacle of slime forced its way into his mouth and shoving its way down his throat.

Izuku struggled in the grasp of the sludge villain. He realized this must've been the villain he'd heard about that All Might was after, but that didn't matter now. He could feel his airways get blocked by the disgusting sludge. The gross slime was holding him there, forcing more of itself inside him and making it worse for him. As he tried to struggle, his mind was racing a mile a minute.

'I-I can't breathe! I-Is this how I die?!'

*Bump*

'I-I can't! I-I don't want to die! I-I'

*Bump*

'Mom! I can't leave her! I don't want to go! Someone! Anyone! Save me!'

*Bump*

'I...I can f-feel it...I-I'm l-losing consciousness…'

*Bump**Bump**Bump*

'I...I… I don't want to die yet… I…'

*Bump**Bump**Bump**Bump**Bump**Bump*

'I...I want...to be...a…'

*Bump**Bump**Bump**Bump**Bump**Bump**Bump**Bump**Bump**Bump**Bump**Bump*

'...hero…'

*SHING!*

"That's it, almost there," the sludge villain said as he forced more of his slime into Izuku. However, just then Izuku's eyes reopened, oddly glowing. "What the? Hey kid what's-GAAAH!" the sludge villain screamed as he felt a distinct sense of burning coming from within. Izuku's body began to exude a glowing green aura, an energy that burned the sludge villain and forced him to retract. "W-What the hell kid?! Stop Fi-GYAAAH!"

*SPLAT!*

The energy around Izuku exploded, forcing every last bit of the sludge villain off and out of him. The energy swirled around him, forming into a giant glowing green egg of energy. Inside, Izuku's body began to change. His old human body reformatted itself, changing into something stronger, something greater, something that the world of quirks had never seen before!

"NEVER FEAR!" A voice called out, as the manhole burst open and a shadow launched right out of it and a hulking mass of a man appeared landing on the ground in a crouching position before rising up and striking a pose. "WHY….BECAUSE I AM HERE!" The familiar voice of All Might Japan's Number 1 hero declared as he was giving his trademark wide smile. "Fear not young lad! For I shall….what?" All Might's declaration was cut short as he finally took notice of the scene before him, as he had heard the sounds of the villain from below and the scream of someone being attacked and knew he had to jump in to save the innocent person from the villains.

However, what he saw now was not what he was expecting.

For the Sludge Villain he had been chasing was no more as he was splattered all around the area of the underpass. To the walls, the ground, even the top of the underpass he was splattered everywhere and from the looks of things he appeared to be knocked out cold. However, that wasn't what had All Might's attention. No, what had his attention, was the thing? Before him that looked to be some sort of glowing green egg. 'Could it be the person's Quirk? A defensive one to protect themself from the villain's attack?' All Might thought to himself as he moved using his speed and collected the villain in a pop bottle. As he was cleaning up, he noticed something laying not too far from where the egg was. 'Hello, what's this?' He thought to himself as he reached down and picked up the burnt looking notebook flipping it over to see who it belonged to.

'Izuku Midoriya, then that means the boy is the one inside of the egg.' He thought as he opened the burned book, taking notice of the information regarding different Quirks. To say he was impressed was to say he was massive, the information in this on the quirks the boy had seen was astonishing if not down right stunning. 'Has he done this all on his own? If so, this boy has a gift.'

Just as All Might finished looking through Izuku's notebook, the egg began to recede. The energy that made it dispersed, allowing Izuku to fall out and fall to the floor gently. However, the boy that All Might saw did not look human. He slowly got close and turned the boy onto his back and gasped at what he saw.

The lanky short teen Izuku had been before was gone. Now, he was something entirely different.

Izuku now stood at 7 feet 5 inches and was no longer the lanky twig he was before, rather rippling with newfound muscles. Most of his body was covered in dark green leathery skin except for his chest, abdomen and crotch were pale beige. His body had bulked up with large biceps, thick forearms, a pair of big bouncy pecs, a set of hardened abs, wide hips, thick thighs and a plump behind. He had a set of red fin-like spikes coming out from the back of his head and running down to the end of his new 4 foot 6 inch long black reptilian tail. Along his arms, legs, back and tail he had a series of black stripes and on the center of his chest he had a black X-shaped mark. His feet were now larger and sported three toes with large dark gray claws on the front and a single gray heel claw, as well as claws of each of his fingers His mop of dark green hair was longer and fluffier, his ears were now pointed, and he had a set of black stripes on each cheek just under his freckles. His green eyes were still the same and his teeth were now sharper. Between his legs was an impressive 18 inch long 7 inch thick member and pineapple-sized balls.

Izuku's eyes opened and he got onto his now clawed-feet, looking confusedly at the area around him, completely unaware of the Number 1 Hero currently staring at the nude boy.

'W-What is this?! Why is he naked?!' All Might thought as he stared and flushed at the sight of the young man who was now near his own height, if not a small bit taller to his shock. He watched as Izuku clenched his clawed-hands in confusion, seemingly completely unaware of what was going on around him. 'Guess I should make sure he's okay.' he thought before speaking. "Excuse me young man! Are you perchance Izuku Midoriya?"

"Izuku…Midoriya?" the dinosaur-looking boy repeated before shaking his head. "No…not Izuku…" His eyes then glowed as a new name, his name, flashed through his mind. "I'm Izukumon now."

"...Huh?" All Might repeated, completely baffled by what the boy said.

Izukumon just ignored All Might, something his former self would be having a mental breakdown for. He didn't care though. His mind felt so clear but foggy at the same time. And his body, he knew it wasn't the same as before, but it didn't feel bad. In fact, it felt kinda hot. His body started to heat up and grow warm, a pleasurable kind of warmth that he could only remember getting brief glimpses of in his past life. His dick, which had been flaccid earlier, started to grow hard as the heat grew greater. Soon enough, his dick was fully erect and Izukumon let out a growl of need. He fell onto his knees and his hand went to his shaft. His dick was sensitive, and even the slightest touch made him gasp.

"Oh. My GOODNESS!" The Number one Hero gapped as he took in the sight of none other than the aptly named Izukumon who had previously been inside of that egg and now was on his knees hand wrapped around his shaft and without an ounce of shame was just jerking himself off. Now All Might was no prude, he was as healthy as any normal male and he himself had once or twice dove into his own needs and wants -when he wasn't too busy being a hero he had done some things here and there as he didn't really have that much time of a love life and he didn't want to worry about someone trying to discover things about him if he got into a relationship so he indulged himself now and then on his own.

Even so, he knew that some people's quirks could affect them differently and that they could react in different ways. He had seen how certain quirks could affect others as well, but never had he come to see a Quirk that would cause a person to transform into an egg, then hatch, and then suddenly the moment they were freed to get down on their knees and start beating their meat right in an open area, even if they were still under a bridge!

This was just indecent!

"Young Midoriya!" All Might called out to him, clapping his hands to try and get his attention. "Young man! I must insist that you stop this at once! I can understand that the sudden change of your Quirk might have affected you! But this doesn't mean you need to do such an act out in the open!" He added. "This is indecent!"

But Izukumon was not listening. He barely registered anything the blonde hero was saying. His focus was entirely on his own needs and pleasure.

He had gone from just lightly touching himself to outright jerking off. The green-haired teen was pumping his heated length with deep heavy breaths. Small puffs of green fire escaped his lips, not that he actually registered it, he was too focused on how hot his body was and how hard his cock was. Pumping it felt so good, and it made his need to release all the greater. His left hand was pumping his dick while his right hand was fondling the large heavy balls that he now sported. He could practically feel the seed swimming in his nuts, just asking to be let go.

"S-So H-Hot!" Izukumon gasped out, completely oblivious to All Might who kept trying to snap him out of it. He felt so good, and he could feel something building up inside him. He could feel the need to release, the urge to climax, the desire to orgasm. It was all rising inside him and centering inside his dick. The pressure built up, getting stronger the more he jerked off and fondled his own balls. He could feel it building, and building, and building, until finally, he reached his boiling point. "GRRROOOOAAAA!"

With an animalistic roar, Izukumon's dick erupted with an inhumane load of spunk. His seed shot right into the underside of the bridge he and All Might were under, covering it a good chunk in white splooge. All Might could only stare as he watched Izukumon's cock shoot off thick ropes of spunk that splattered the walk he had just cleaned the Sludge Villain off of. He was both shocked and a little amazed by the amount that Izukumon released.

"Haaa~" Izukumon moaned in bliss after his release ended. The wall of white slowly moved down, reaching to the floor. As it did, Izukumon's eyes caught a glint of light that grabbed his attention.

Seeing that Izukumon seemed to have finished, All Might coughed into his hand. "Ahem…well," he began, scratching the back of his neck in embarrassment. "N-Now that you've, ahem, gotten that 'out of your system', so to speak, do you feel any better, Young Midoriya?"

"I told you, my name is Izukumon," replied the greenette before facing the Hero, the strange device that had helped transform him now in his hand. "And now, it's your turn All Might." Before the hero could even think to question Izukumon's words, the greenette raised the device and the screen shined before flashing a beam of light right at All Might.

"H-Huh?!" All Might yelped as the beam of light hit him in the chest. Once it did, His mind and body froze. The soda bottle that held the sludge villain dropped to the ground. His darkened eyes glowed bright blue as a similar-colored aura surrounded him and then exploded. Where All Might once stood now hovered a large floating blue egg made of the same energy that had consumed Izukumon earlier.

Izukumon smiled as he stared at the egg, wondering how All Might will turn out. As he watched, more memories of his past life flooded into his mind, mixing with his new thoughts and desires. His adoration and fanboying over the number one hero mixed with his new lustful desires, making him even hornier to see what his idol would look like.

He didn't have to wait too long as the blue energy egg began to recede and disperse, allowing for the transformed hero to fall out. Unlike Izuku, All Might landed on his feet. And as he stood up tall, Izukumon marveled at how the Number One Hero had been changed.

All Might now stood at a towering 13 feet tall with a powerful muscular form that looked even beefier than before. His skin had taken a metallic sheen with powerful muscles that dwarfed his old form. He had large boulder red shoulders each with three curvy white stripes, massive blue biceps and triceps, thick yellow gauntlet-like forearms with white plates on the outside with three sharp white and red claw-like blades sticking out of them, blue hands with white finger, A red collar above a pair of gigantic white muscular pecs with a large yellow metal bearing in the center, a steel-hard set of white 8-pack abs, a blue torso with red curved stripes running along the waist, thick blue thighs with red lines going down the top, white knee rings, yellow cnemis with white outlines and ankles, large blue feet with three white toe claws and white bases, a fat toned blue ass, and a monstrous 55 inch long 20 inch thick white cock with red ring-stripes accompanied by a pair of 40-inch thick white balls. Above his ass was a 7 foot long leathery belt-like tail that sported a rounded end with a white ring in the middle with a hole in it and three red marks. His neck was blue with a white front, and his face looked young with a blue top-half and a white bottom-half. His hair had become a wild mane, and the two iconic bangs now drooped down reaching to his chest, barely covering the blue canine-like ears he now sported. The shadow over his eyes was gone, revealing a pair of bright blue irises brimming with energy, and a blinging iconic smile that lacked any wrinkles.

"This…feels… AMAZING!" All Might boomed, flexing his new body and smiling widely. "I haven't felt this amazing in over five years! And even then, this feels completely unbelievable!"

"I'm glad you feel good, All Might," Izukumon said, but All Might shook his head.

"No, I'm not All Might anymore," the towering blonde said. "I'm Toshinorimon! Thank you young Izukumon. This feels utterly incredible!"

"I'm glad," Izukumon said before licking his lips at the sight Toshinorimon's massive dick.

Toshinorimon continued to flex his new form, but stopped when he felt something press up against his member. He looked down and saw Izukumon grinding his plump dark ass against the larger man's dick. "Y-Young Izukumon?" Toshinorimon questioned, only to let out a pleasured groan as the greenette rubbed his rear against his rod.

"Come on Toshinorimon~" Izukumon teased as he grinded his booty against the fat shaft that quickly hardened against it. "Don't you want to play with your Number One Fanboy~"

Toshinorimon bit his lip before growling "Fuck it," and reached forward and grabbed Izukumon's chest, pulling him into his own.

"A-Aaah~ T-Toshinorimon~" Izukumon gasped as the DigiHybrid he had idolized teased his body. Toshinorimon squeezed the greenette's pecs while grinding his huge white and red cock against Izukumon's plump round cheeks. Izukumon could feel the heat raging from the Number One's member against his ass, and his hole itched to feel it inside him.

"Such a naughty boy, Izukumon," Toshinorimon growled as he squeezed the smaller male's chest and dry-humped his ass. He could feel his arousal quickly growing, and the desire to breed the greenette was quickly overtaking his mind. "Tell me Izukumon, do you want my 'All Might' cock up your ass? Do you want me to SMASH you until you can't even walk?"

"Y-Yes!" Izukumon cried out, hearts in his eyes as he could feel the full heat of Toshinorimon's cock against his arse. "P-Please Toshinorimon! Make me your slut! Fuck me stupid with you Number One Cock!" Izukumon's own cock was bobbing with excitement, dripping pre onto the ground which was still partly covered with his own seed.

Toshinorimon moved his hands from Izukumon's chest to his waist. He pulled back and lined up the bulbous head of his shaft with Izukumon's ass. He pushed, going past the plump cheeks and meeting Izukumon's hole. The entrance stretched for Toshinorimon's dick, yet still held a tight hold on it, making it feel better for the muscular blonde. Once he was halfway inside, he thrust the rest in without a second of hesitation.

"AH! FUCK!" Izukumon screamed as he felt Toshinorimon's massive rod plunge into his ass. It was so big! If he were still a human this massive cock would have split him in half if not worse! But Izukumon didn't care about that. He was too focused on the absolute bliss he had from Toshinorimon ramming that fat bitch-breaker cock into his ass! "T-Toshinorimon!"

"I-Izukumon!" Toshinorimon bellowed in the same state. Izukumon's ass was incredibly tight and clung to his cock so well. Izukumon was so warm inside, and his hole was squeezing down on Toshinorimon's cock while also stretching with ease to fit its shape. Toshinorimon was almost tempted to just remain with Izukumon mounted on his dick for the rest of their time, but a greater urge won out. He pulled his length out until it was only half way in before slamming deep into Izukumon again and then again.

"NGH! AH!" Izukumon grunted as his ass bounced on Toshinorimon's cock. The fat rod was driving deep inside him, practically flattening his prostate. His ass cheeks smacked against Toshinorimon's hips, turning that dark gray skin slightly red. As his ass got pounded, Izukumon's dick flopped about and his pecs bounced with each thrust. Pre flew across the floor and wall, splattering into the white splooge that covered the underside of the bridge.

"Y-You're so tight, Izukumon! Oh! My! GOODNESS!" Toshinorimon bellowed, his voice echoing in it's All Might tone. The beefy blonde never would have thought he'd be able to experience such pleasures again since his injuries five years ago, but this green-haired boy changed that. He could feel Izukumon's pleasure mixed with his own, all with the warm tight hold of the greenette's ass squeezing down on his dick despite how hard and fast Toshinorimon railed it. He would never let Izukumon go after this, not that the green-haired boy would ever want to now.

"T-Toshinorimon!" Izuku screamed, his eyes with hearts and his face agape with a lust-crazy smile. "Fuck me Toshinorimon! I'm gonna cum! Smash me! Make me cum!" He felt so close. His first time cumming felt so good! He wanted to feel it again! He wanted to keep feeling this good for the rest of his life.

"Izukumon!" Toshinorimon exclaimed. "You are so tight! I can feel it! I'm about to burst as well!" Toshinorimon could feel his balls ache and his cock ready to explode. Even so, he did not relent on his powerful pounding. Izukumon's ass kept getting tighter around his length as the young greenette got closer to his own release, which caused Toshinorimon to go wilder and quickly increase his need to release. "Izukumon! I'm about to cum!"

"Me too!" Izukumon screamed. Toshinorimon was driving Izukumon's nerves to the brink. He was sure to cum soon. "Let's cum together!" Toshinorimon grunted in agreement and increased his pace, slamming in and out of Izukumon's ass with speed and power that would decimate villains if they tried to take him on. The two hot and horny male moaned and gasped as they got closer and closer to their climax, letting their bodies go into overdrive until finally, they came.

"SSSMMMAAASSSHHH!"

The duo screamed together in unison as they orgasmed. Izukumon's seed shot out the same as before, hitting the already cum-coated walls with even more spunk as he had done so early. Toshinorimon's cock bulged in Izukumon's hole before unleashed a flood of spunk that easily outclassed the greenette's load. A massive surge of seed blasted its way into Izukumon's guts, quickly filling his stomach and making it immediately expand from the sheer volume of cum being emptied out inside him. Izukumon's eyes went wide as he felt Toshinorimon's seed blast its way inside him. Not even in his lewdest dreams did he think that his idol would ever climax inside him, and it only made the feeling so amazing.

Izukumon leaned his head back, And Toshinorimon met him with a searing kiss to the young transformed man's lips.

As they kissed, Izukumon's gut continued to expand and the wall and floor became coated in splooge. The bottle that held the sludge villain and Izukumon's personal items were luckily away from the copious amounts of seed that cascaded down the underside of the bridge. Despite their cries and moans, since they were in a more secluded and devoid part of the city and under a bridge, no one had seen or heard them.

By the time they had both ended cumming, the underside of the bridge was entirely coated in white, and Izukumon's stomach was so bloated out he looked like he was carrying two full grown adults inside.

Toshinorimon slowly pulled out of Izukumon's ass, not a single drop of cum amazingly slipping out. Once he did, a soft blue glow covered Izukumon's stomach and it quickly deflated, returning to its now toned state. As he set Izukumon down to the ground, the cum that had coated the walls began to disperse into fragments until nothing was left.

"How?" Toshinorimon said as Izukumon revealed the device that had changed them both.

"This little thing lets me clean up our mess," Izukumon replied. "And our new bodies lets us absorb sexual juices a lot quicker. Which means we can keep going for a while." Izukumon gave Toshinorimon a lustful grin that the blonde man laughed and met with another kiss.

And so, the transformed Number One Hero and fanboy continued to fuck for another hour. They would have kept going until who knows when, but both had received calls wondering about their whereabouts. They were partly tempted to just run away together to continue this new way of life, however, Izukumon came up with an idea- Why limit this kind of new life to just themselves?

And so, they used a new power to change into how they looked before the transformation, complete with clothing. They bid each other goodbye with a final kiss before parting ways.

As he walked, Izukumon began to think of all the fun ways this new life of his would go. With the strange device that had changed him in his hand, which he now somehow knew was called a Digivice, he silently made plans for the future.