Endure and Get Stronger!

Fandom: BNHA/MHA

Pairing: Todoroki Enji/Todoroki Shouto

Rating: 18+

Warnings: Incest, Underage, NonCon > Dubcon

Summary: Enji has a very special endurance training in store for Shouto - training that will make him even stronger, putting him on the path of being the one who can overcome All Might!   

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Kneeling at Dad’s feet, his tightly clenched fists pressed to his knees, Shouto focused intently on the floor. The cool air of the training room nipped at his exposed skin. His butt resting on top of his ankles was a weird sensation that he didn’t care for in the slightest. Between his thighs, his small penis was limp and soft. Unlike Dad, who had a wild bush of bright red pubic hair, he only had a few sprigs that were only noticeable when looking really closely. Towering over him, his arms crossed over his beefy, hairy chest, Dad had been staring at him silently for what felt like hours. Despite the low temperature of the training room, he was already drenched in sweat. His stomach was twisted in a tight, uncomfortable knot. Cold dread rolled sluggishly through his veins, lowering his body temperature even further. Panicky, fluttering questions darted about his mind. Why was he naked? Why was Dad naked? He had told Shouto earlier that they were doing endurance training today (which was already terrifying all on its own) but why did they both have to be naked for that? However, the most important question was…Shouto hesitantly glanced up then quickly returned to staring hard down at the ground, his heart lurching unpleasantly. 

Why was Dad’s penis erect? The length stood straight up from that bush of wiry hair, twitching and dribbling precum. It was…terrifyingly large. Perfectly proportionate to Dad’s massive size, his penis was nearly the same length of Dad’s forearm and so thick that if Shouto were to wrap his hands around it, the tips of his fingers wouldn’t come anywhere close to touching. Its girth was the same as one of Dad’s muscular arms. The size was so similar that it looked like he had sprouted another limb from his crotch. It was a telephone pole, a sledgehammer – just ridiculously, unbelievably big. Prominent veins that were more like highways ran along the surface of that immense girth. Pearls of clear liquid swelled to the slit before sliding down the smooth skin to drench his pubic hair or plop down onto the pristine floor. 

As if being forced to kneel completely naked at Dad’s feet wasn’t bad enough. Shouto frantically scrambled to find a reason why this was happening, but his anxiety drenched mind couldn’t come up with anything. This…it was beyond bizarre. Normally, when he was dragged into this room, it was to spend the next few hours being battered and pushed until it felt like his body had been transformed into a huge bruise. This…what was this? Was Dad going to make him fight naked? It didn’t seem entirely out of the question for Dad to do something that weird but, for some reason, he didn’t think that was it. Something about this atmosphere was…off. Dad didn’t like to linger. If he wanted to do something, he’d do it – he wouldn’t stand there for an uncomfortably long time without saying anything. No, something else was going on…something that Shouto couldn’t figure out. Whatever it was, though…he wanted no part of it. The urge to bolt was getting stronger by the moment. The alarm bells going off inside his head were deafening. His anxiety levels were so high, he felt sick. 

“Turn around.” Dad suddenly spoke, his deep voice booming through the training room like a peal of thunder. 

Jumping, his heart dropping down into his stomach, Shouto acted on instinct, spinning around so his back was to Dad. What was going on? What was he going to do? He heard Dad take a step towards him. A bucket of cold poured down into his stomach. His heart was a blur of motion. Sweat rolled down his back. Was he going to hit him? Kick him? What was this?! What was-?! Large, hot hands clamped down in a vice grip on his waist. Before Shouto had time to react, he was being lifted into the air. Crying out in alarm, he began to kick and struggle, despite knowing there was no chance of escaping. He was no match for Dad’s strength. Panting rapidly, his eyes stretched open wide, Shouto started to twist around to see if he could discover what Dad was doing but froze halfway. His breath lodged as a ball in his throat. Ice coated his muscles. His stomach fled down to his knees. Something…something was touching his butt…something very big and very hot…it was slipping between his cheeks and touching his…his-! That thing…there was only one thing it could be! Why…why was Dad’s thing touching his butt?! 

“What-“ Shouto gasped, trembling violently in Dad’s hold, “What are-“

“I told you.” Dad rumbled from above him, “Endurance training. If you can endure this, you can endure anything. Learn from this and harden your body, lengthen your stamina, steel your mind.”

“No…” He slowly shook his head, tears welling up in the corners of his eyes. Dread and horror roared through his body, leaving him feeling cold and weak. What…what was Dad going to do?! How was this endurance training?! Shouto started to hyperventilate. The tip of Dad’s penis pressed to his hole. A hard tremble wracked his small body. Eyes bulging, Shouto kicked out his legs, panting and whimpering. What was this?! He…he didn’t get it! Scared…he was scared! Tears streaked down his hot cheeks. His stomach was violently spinning. He felt like he might puke at any moment. Dad’s hands were like burning coals on his skin. Thoughts wildly whizzed about in his mind, screaming shrilly as the words became more and more jumbled until everything was just a loud buzz of frantic sounds and panic. Run! He needed to run! He needed to get away! He…he didn’t know what Dad was planning on doing but he…he didn’t want it! He didn’t want any of this! 

“Remember, Shouto! This is all to make you into someone who can win against All Might. You need to be strong and this will make you strong!”

The tips of Dad’s penis pushed firmly against his hole, pulling a strangled yelp out of Shouto, “Don’t pass out on me. You will endure this and get stronger.”

“No-!” Shouto whispered, his voice trembling, “Stop-! Da-!”

Without warning, Dad slammed him down, impaling him on his monstrous penis, forcing him to take every inch of him. It forcibly slipped past the tight ring of muscles to sink deep into his butt. The rounded curves of his butt smooshed against Dad’s pubic bone. Wiry pubic hair tickled his overheated skin. Mouth stretched open wide, his head thrown back, eyes bulging, the chords in his next standing out prominently, Shouto tried to scream but couldn’t make a sound. Inside-! Dad’s penis was inside his butt-! His huge penis was inside his hole! Big-! He was too big-! His butt was being stretched beyond its limit! It was so deep inside him, he could feel it in his belly! His butt…his belly…they were going to rip! He was going to tear them! He was going to tear open his belly! Despite the massive length inside him, there was no pain. Only an intense heat and pressure that was making him feel…weird. His head was blank and full of fog. There was something wet and pulsing in-between his trembling thighs. Sweat soaked his overheated body. Tingles rushed out across the surface of his skin. Shouto’s teeth clenched together in a terrified grimace. He…he didn’t want this! He didn’t want Dad’s penis inside him! It was weird! This was weird! Scared…he was scared! 

Gagging, hardly able to get breath out, Shouto’s head fell forward. His already bulging eyes widened even further. Something was wrong with his belly. Instead of the usual soft curve, it was swelling outwards to a prominent curve. Dad’s penis…it was so big, it was reshaping his belly! He…he could feel his organs being rearranged, force to accommodate that immense girth! Tears streamed down his face. He started to sob weakly. Dad’s cock was going to kill him! He was going to die! There came a low, pleased grunt from somewhere above him. Curling his hands even tighter, to the point that it felt like he might crush his bones, Dad pulled back, slowly sliding his penis out of Shouto’s spasming hole until just the fist liked head was inside. A hopeful bloom of relief blossomed in the center of his chest. Was he stopping?! Did he endure enough?! Please, he begged inside his head, please, let that be it. No more! He didn’t want Dad’s penis inside of him any longer! 

“You didn’t pass out. Good. Your brother barely lasted a couple of seconds when I first shoved it in. Now, let’s see how long you’ll last. Touya’s record was 2 hours and 22 minutes. You’ll need to work hard to beat him.”

Shouto wasn’t given any time to respond or prepare himself. Wrenching him back down, forcing his penis back inside, Dad began to rapidly, viciously yank him up and down on his penis, using his butt to stroke the immense girth. The prominent veins scraped along his insides, creating a friction that made his nerves hum. A heavy fog settled over his mind, making it hard to think. His body was burning so bright, it felt like his fire quirk had gone out of control. Every time Dad thrust all the way in, his belly bulged out. When it flattened back down as Dad slipped out, Shouto was given a look at his shamefully hard penis. His penis…why did his penis feel so good?! Why…why did having Dad’s penis inside his butt feel so good?! He felt so strange! His brain felt like it was melting! His butt…his belly…both were so hot and full! Gasping raggedly, his legs swinging from the force of Dad’s movements, Shouto whimpered and wailed at that good feeling kept growing and growing. What was wrong with him?! Why did this feel so good?! Shame and mortification burned a hole in the center of his chest. He didn’t want to be made to feel good with Dad’s penis! 

There came a rusty, husky laugh from somewhere above him, “You’re already proving better than your brother. Keep this up and you’ll have him beaten in no time.”

“Stop-!” Shouto gagged out, weakly shaking his head, “Take it out! Please!”

Dad laughed again, leaning down to playfully nip at Shouto’s ear, “Now, now, Shouto. I told you: this is training. You will endure it and you will grow stronger.”

“I don’t wanna-! I don’t wanna-!” Shouto sobbed miserably. That good feeling was getting so big that…it felt like something might burst. His eyes widened. The pace of his breath picked up to a near hyperventilating level. Something…something was coming! Pee…he was going to pee! There was a burning pressure in the base of his belly, pushing hard against the base of his penis. Gasping sharply, plagued with dizziness, buzzing with that bizarre feeling of good, Shouto tried once more to make Dad stop but before any words could come out, something inside him seemed to snap. There was a sharp spike of heat that pierced right through his belly. His back arched. Every muscle in his body tensed up. Pushing a wailing cry through clenched teeth, Shouto’s hips trembled as something thick and white poured out of his penis. The sensation was…incredible. It felt so amazingly good. Dad kept thrusting his penis into him as he rode that tidal wave of good. His nerves were squealing in delight. His butt and penis were melting. His head was full of sparkles and fireworks. 

“Oh.” He heard Dad say, “That’s a surprise. Touya didn’t cum at all the first time.”

“Weird…” Shouto gasped, “Becoming…weird…stop…stop…”

Dad snorted amusedly, “Weird? No, this is the expected reaction to being fucked by my superior cock. This feels good, doesn’t it, Shouto?”

“G…good…” Shouto breathed, his head whirling. He…he couldn’t make sense of anything anymore. Good…good, it did…it felt so good! Dad’s penis was making him feel so good! He hated it…he hated it so much…but…he wanted more…he wanted to feel even more good. That want…it scared him…it scared him so much. What…what was happening to him?! What was Dad’s penis doing to him?! 

Warm breath washed against his ear, making him shiver, “Daddy is feeling good, too. Your hole is so tight, it feels like your milking me. Not even Touya could compete with this. You know, he couldn’t make me cum until our seventh session of training but this ass…it’s going to milk me dry.”

A hot tongue dragged over the shell of his ear, inciting a spasm of heat to rush out from his throbbing penis, “You want that, don’t you, Shouto? You want me to stuff your belly full of my seed?”

“No-!” Shouto whimpered. What did he mean? Seed? Cum?! This…he wanted it to stop! He couldn’t take anymore! His body, his brain, all of him was becoming so weird! If Dad kept using his penis to mess with his butt, it was going to be bad! 

A warm, fond chuckle filled up his dazed head, “Touya put up the same resistance but was begging for my cock by the time our endurance testing was over. Fight and scream all you want, Shouto. You won’t be able to resist for much longer. Let’s see if you’re singing the same tune after this!”

Forcibly slamming Shouto down all the way, shoving every inch of his penis inside him, Dad shallowly pumped his hips a couple of times, thrashing his penis around the interior of his butt, pulling a strangled cry out of Shouto. The blast of heat and tingles that rocketed through him brought back that intense feeling of something coming. His stomach swelled out, engorged by Dad’s penis. Good-! Good-! It felt so good-! His butt-! His belly-! Everything felt so GOOD! GOOD! He…he was going crazy! Dad’s penis was driving him crazy! Wailing at the top of his lungs, eyes rolled back in his head, tears streaking down his flushed red cheeks, Shouto bounced limply in Dad’s hold. His penis swung up and down, splattering precum everywhere. Fear pulsed underneath the golden fog clinging to his brain. This was wrong…he knew this was wrong, he knew that he shouldn’t be feeling good but the sensation of Dad’s cock grinding against his abused, overstimulated insides, finding spots and places that made him see stars, was making it very hard to think about that. Again…that pressure was getting bigger, that buzzing, tingling sensation was getting bigger! Shouto sobbed hysterically. Not again…not again! He didn’t want to do it again! But…it didn’t matter what he wanted. Dad kept roughly pumping into him, messing him up deep inside, stirring up his stomach, making that heat, that pressure grow and grow. 

“Stop-!” Shouto choked out. 

“You’re so good, Shouto!” Dad grunted, “Cumming! Gonna cum! Gonna stuff this slutty hole with my seed! Swallow it all down, Shouto!”

Shoving his hips forward, pushing his penis in even deeper, Dad smooshed the curve of his butt against his pubic bone. His penis swelled up even bigger, forcing the walls of his butt to stretch even more to make room for the increased girth. Then, with a snarling groan, a flood of thick, scalding hot fluid was pouring into him. Shouto screamed shrilly. His tongue hung out of his gaping mouth. Eyes bulging, his spine ramrod straight, he twitched and trembled as he experienced another of those wild rushes of heat and good. The sensation…it was too much for him to take. His legs twitched. The muscles in his lower stomach clenched. His penis violently spasmed, spraying pee all over the floor. Stars exploded in front of his vision. A loud roar filled up his ears. Good-! Good-! Daddy’s penis was making him feel so good! Cum…this was cum! This was Daddy’s cum! It was flooding into his belly! There was so much of it! Too much-! His belly! His belly was being stuffed full! It swelled up to a pronounced curve, becoming heavy with all the cum being pumped into him. Moaning loudly, a delirious smile on his face, his heavy lidded eyes hazy, Shouto stared down at his belly as it continued to swell, becoming bigger and bigger until he looked like pregnant. There was so much inside him…maybe he would get pregnant with Daddy’s baby. Shouto giggled at the thought. 

Blowing out a harsh breath, Dad was still and silent for a few moments, seemingly to recover from feeling good then, suddenly, Shouto found his cheek pressed to the smooth floor of the training room. His butt was wrenched up high in the air. His legs dangled uselessly. A loud, wet moan rolled out of his throat when Dad began to roughly pound into him once more. That good feeling came rushing back in, quickly overwhelming him. His engorged stomach bounced lewdly with every collision of their bodies. In this position, Dad’s cock couldn’t slip in as deep, but his speed was even faster, harsher, pummeling into him with a strength that quickly made that white stuff come out of Shouto’s penis. One of Dad’s powerful hands grabbed a handful of his hair, wrenching his head back. Shouto squealed loudly, the ripple of pain rolling along his scalp only serving to excite that terrible, incredible feeling of good even higher. He had no leverage but that didn’t stop him from kicking his legs to try to push Dad’s cock deeper into him. 

Growling out a rumbling moan, Dad rasped, “Again…gonna cum again!”

A wild thrill of happiness pierced through him. Spreading his legs open wide, greedily tightening the muscles in his butt to try to squeeze that milk faster, Shouto howled in naked, shameless delight when Dad slammed forward and came again, adding another immense flood of fluid to his already stuffed full stomach. Only, there was nowhere for it to grow. His belly couldn’t take any more! With a loud gurgle, a geyser of milk poured out of his gasping mouth, splattering all over his face and the floor. Thick, salty fluid clung to his tongue. Shouto moaned happily, delighted that his butt had been able to squeeze out even more of Daddy’s milk. His stomach was groaning from the weight. A steady stream of his cum poured out of his mouth. Good…this felt so good…being used like this felt so good! More-! More-! He wanted that thick, fat penis to fill him up even more! He wanted even more of Daddy’s milk! 

Letting out a harsh breath, Dad straightened up, slipping his penis out of Shouto’s sloppy butt. Shouto dropped down onto the floor, trembling and gasping. The moment that obstruction was gone, a flood of milk began to pour out of him. Moaning softly at the sensation of that hot fluid streaming down his thighs, Shouto hazily watched Dad stretch, showcasing his impressive muscles. Despite having released his milk twice, his penis was still rock hard. A needy throb began to pulse in the center of his chest as he stared hungrily at it. More…he wanted more…they weren’t stopping here, were they? He could still do more! But…Dad’s attention already seemed to be elsewhere. He wasn’t even looking at him. Burning with that need for more, Shouto frantically scrambled to think of something. Then, with a pop, a thought appeared in his mind. Shakily rolling over onto his back, he clumsily scooted around until he was facing Dad. To his relief, he turned to look down at him, wearing that usual distant, cold expression. Swallowing hard against the dryness in his throat, Shouto stuck his legs up into the air and reached down to spread open his butt, revealing his sloppy hole. 

“More…” He gasped, “I want more-! Please-!”

Dad’s eyes widened. He gawked down at him for a few tense, silent moments – long enough that Shouto started to get worried that this wasn’t good enough – then a smirking smile spread across his face. Crossing his arms over his beefy chest, Dad asked, “What exactly do you want more of, Shouto?”

“Your penis.” Shouto whispered, too desperate for that thick length to feel embarrassed, “I want your penis in my butt. Please…”

“This?” He lightly tapped the tip of his monstrous penis. 

Shouto nodded shakily, his breath catching with excitement. 

“This isn’t a penis, Shouto. This is a cock. And this,” Shouto gasped sharply, his hips bucking, when Dad pressed his big toe to his puckered entrance, “isn’t your butt. This is a pussy. It is a slutty, whore pussy. Now, tell me again what you want.”

He pulled in a shaky breath. His heart was beating like crazy. His penis was throbbing. Staring up into those cold eyes, Shouto said, “I want your cock in my slutty, whore pussy.”

“Louder.”

“I want your cock in my slutty, whore pussy!”

“Louder.” 

Squeezing his eyes tightly shut, feeling like he might cum from just this, Shouto wailed at the top of his lungs, “I want your cock in my slutty, whore pussy! Please! Stuff my slutty pussy full with your cock! I want your milk! I want Daddy’s milk!”

Dad’s smile grew even bigger. Laughing low in his chest, he murmured, “You’re already so much better than your brother, Shouto. Fine, I’ll give you exactly what you want.”

One large hand lashed down to grab Shouto’s ankle. Easily dragging him close, positioning the tip of his cock to line up with Shouto’s pussy, he rasped, “Remember, you asked for this. I’ll fuck you as much as you want so take these lessons and become strong enough to defeat All Might!”