The World's Greatest Fighter!

by ShadowK54

The world is filled with many skilled martial artists, but Izuku wishes to become one of the best, if not the best, martial artists in the world. See Izuku in his journey to become what he has always dreamed of being since he was a young boy. The world's greatest fighter! Izuku X Harem

1. Izuku Midoriya, The Young Fighter

Discliamer: I do not own My Hero Academia or any of its characters. It all belongs to Kōhei Horikoshi.

Chapter 1: Izuku Midoriya, The Young Fighter

( Cue "River" feat. Ed Sheeran - Eminem )

"Fifty three.. fifty four.. fifty five.. fifty six.."

Izuku Midoriya, a sixteen year old boy that dawned a six foot lean muscle figure that was currently drenched in sweat, having green eyes and messy green hair with black shadows in the locks, also having four freckles on both of his cheeks by the bottom of his eyes, was counting the amount of times he did a successful chin up on a sturdy branch that was attached onto a short thick tree around an open area of a park that was near the green haired teen's apartment complex where he lived with his mother, Inko Midoriya, and his adorable little sister, Eri Midoriya, who Inko had adopted a year back.

The teen currently wearing a pair of black baggy athletic shorts, white sneakers and a white tank top that due to the vast amount of sweat he was giving of, clung to his upper body to show his impressive build. A pair of dark grey earbuds in his ears that went down to the left pocket of his shorts, connecting to a touch screen cellphone.

Whenever Izuku had worked out, he was always indulging in the rigorous nature of it, so much so that he was making himself become unaware of his surroundings, and his music was of course no help. If he was aware, he would know that working out in a public place is bound to attract some attention of the impressed and flirtatious nature by some of the youthful females of passerbys in that area of the park. Even some quiet comments of how cute, strong or even 'yummy' Izuku looked were made. Then again, this would not be his first, second or even fiftieth time exercising in this specific area. As there was some regular visitors that would come to the park just to oggle the boy on a daily basis.

It took a minute before the teen was beginning to finish up his set of one hundred pull ups on the branch, finishing the last number with a strained voice as he lightly grunted when letting go of the branch, panting heavily as he slouched down forward, his hands holding onto his knees as he took the time to regain his stamina. His body heaving with each rapid breath that was released, sweat dripping from his chin, nose and the tips of his thick locks, his hair shadowing his eyes as his jaw was slightly lowered. Remaining in that position for half a minute before he slowly stood up and arched his back, regaining a decent amount of his stamina back. He let out a breathy groan as he rolled his arms, starting with the right arm before moving onto the left. "Hew.. that was good.." He stated to no one in particular, though the workout was intense and always had him feeling a bit of pain by the end of it, it was a pain that he found himself enjoying every time he felt it. It is always as they say, "no pain, no gain." And that could not be more true if his body was not any indication.

The pull ups was not the only exercise he had done so far during his time in the park, as he had engaged in some stretches before starting his workout with a few minutes of Tai Chi mediation, followed by push ups, kicking exercises and shadowboxing earlier before the chin ups.

( Song ending in the middle of a Chorus )

Izuku hummed curiously as he heard his song suddenly stop midway and his ringtone begin to emit from the earbuds, signifying he was recieving a call. He reached into his pocket to fish out the celluar device before holding it up by his stomach and seeing who his sudden caller was. He smiled as the caller ID was one he instantly knew, for obvious reasons.

'Mom'

He did not keep his mother waiting much longer as he answered the call before he brought the mic of the phone close enough to his mouth for Inko to hear him answer her. "Hey, mom! What's up?" He uttered in a delighted manner.

Inko could be heard softly giggling as it was not hard for her to notice that her son was still slightly out of breath judging from his lightly pacened breathing on the line. "Well, well, working hard over there as usual huh son?" Inko responded, now chuckling lightly as she finished.

Izuku scoffed as he had suppressed a chuckle of his own, moving to lean back against the thick tree by him while he conversed with his mom. "Only way I know how to mom." He replied back as he smiled softly, already enjoying the conversation so far.

"Okay, my tough man." Inko teased before giggling softly once more.

Izuku's face flushed at that remark, though no one was around to hear it, it still had the teen slightly embarassed to hear her call him such a nickname. "Moom." He replied in complaint. "You promised you would not call me that anymore. It's so embarassing." He pouted as he shook his head when letting out a sigh.

"Oh, you know I'm just teasing you sweetie, no need to get all worked up." Inko replied nonchalantly.

The teen then huffed before slightly smirking. "Uh huh, so what's going on, mom? You okay?" He asked concerningly.

"I'm fine, just wanted to call and ask if it would not be too much of a bother to pick up some milk after you're done?" Inko asked, hoping that her son would be so kind, though there was no need to hope for such a thing as she already knew what he was gonna do about it, but it was a habit for her.

Izuku hummed in acceptance to the request, as he had never once in his life said no to his mother, not out of fear but because it was just in his caring nature. "No problem mom. I'll get it in just a bit, almost done here really."

"Thank you Izuku, I always could count on you." Inko spoke in a heart warming voice.

Izuku smiled warmly at that comment, nodding as he replied back. "Of course, mom, always. Alright, I'll call you when I'm on the way after picking the milk up. See ya, mom."

"Okay, see you later, sweetie." Inko replied before the two Midoriyas ended the call.

The green haired boy placed the phone back into his left pocket after resuming the song he had on before his mother had called. "Alright, time to get this over with." He whispered to himself as he was now beginning to stretch out his legs for a good minute to make sure as he had intended to finish off the workout session with a half hour jog around the park on its stone paths.

'Forty five minutes later'

Izuku was now currently standing in front of the drink refridgerators aisle that were at the far back of the decently large convenience store, behind him were four other aisle rows that had a variety of snacks and sweets stacked neatly on the shelves. The boy had his right hand holding onto his chin as he looked in deep thought, in his left hand by his hip was the handle of a thin plastic jug that contained milk within it. Izuku was currently debating with himself on which brand of water he should purchase as he was looking back and forth between two different brands of water bottles that were placed side by side, the boy huffing through his nose as he was nearly at a loss on what to choose. 'Evian.. or Dasani.. God, I always have a hard time trying to pick.. why did they have to be so equally good and refreshing?' He internally complained as he let out a defeated sigh, slightly slouching as his head lowered.

Ding!

The doorbell that was set up to ring whenever someone was to enter the store echoed throughout the building, Izuku not paying it any mind as it could just mean that another pleasant customer had just arrived to purchase the stores fine contents.

Bang!

But that was not the case when the defeaning blast of shotgun suddenly filled the store immediately after the bell had rung, screams of panic and fear began to momentarily flood the store as everybody began to fall down onto floor instinctively to be safe.

Izuku gasped sharply as his eyes widened in shock at the sound of the shot, quickly turning to look over at the entrance and what he saw had him quickly ducking into cover behind the end of one of the aisle shelves. Breathing softly but quickly as he already began to feel adrenaline from the dire situation that was now occuring within the store. Thankfully, the ones who had just walked in had not noticed him since he was far in the back.

Walking into the convenience store were five men masked in balaclavas, two armed with guns, a Ithaca shotgun and a black snubnose revolver, while the other three were armed with blunt weapons, two crowbars and a silver aluminum baseball bat. The man with the shotgun seeming to be the leader as he had the superior weapon and began to dish out orders to the frightened civilians. "Alright, everbody get the fuck down to the ground! This is a robbery! Now if you all just listen and don't do anything you'll regret, I promise that no lives will be lost here!" The leading thug urgently advised, cocking his shotgun to load another shell into the barrel.

The civilians, excluding Izuku, were not brave enough to combat against the thugs as they did what they were told and laid flat down on their front with their hands behind their heads, shaking and whimpering. A young boy that had black hair under a large dark red hat that had two small pointy gold horns sticking out at the front could be heard crying as his mother was shielding him from the sight of the ordeal, whispering and trying to remain brave for her extremely fearful child.

"Okay, now that I have all of your attention! Here's what's gonna go down! All of you are gonna strip yourselves of your wallets and any other valuables you possess right now! And my boys are gonna be coming around to each and every one of you to collect them! If any of you don't plan on handing them over or attempt to try and be a hero!" The thug than fired off a warning shot at the cieling with his shotgun, making a big hole open up above him, the civilians immediately shrieking and screaming in horror along with the loud blast, everyone not hesitating to begin digging in their pockets to fish out their wallets and leaving them on the floor, while some were stripping themselves of any jewellry or any other fancy accessory they had on them, the thug cocked his devastating weapon before giving off a evil chuckle. "Well I'm sure the consequences are pretty obvious at this point. Get them boys." He ordered his accomplises as the ones with the revolver, a crowbar and the bat began to gather up the items in small black sac bags. "That's the way to do it people! Good work!" The leader chuckled once more.

"Now you!" The thug with the shotgun turned his attention over to the cashier that was working behind the counter at the store, it was a petite teen female that had short purple hair with onyx eyes and a fair complexion, she was wearing black casual boots, a pair of denim jeans and a plain blue shirt that appeared to have the store's logo over on the right breast, a pair of white earphones dangling from the collar of the shirt, and over on the left breast was a nametag displaying the scared for her life girl's name.

'Kyoka Jiro'

"Y-Yes sir." The girl whimpered as she held her hands up by her shoulders, her body trembling as she could be able to see down the barrel of the shotgun that was now pointing over at her, trying to remain as calm as she possibly can so she can comply with the robbers demands and come out of this situation alive and.. not really well.

"Start emptying that cash register and put it all in here!" The thug ordered as he tossed his own sac bag onto the counter, Kyoka immediately complying as she uttered frantically in obedience to his demand and took the bag before beginning to empty out the register's contents to place it all inside of it. The girl sweating profusely as she tried to hurry.

While all this was happening, Izuku took a deep breath to ease his stress, as the one with the crowbar that was not helping with the item gathering was beginning to wander down one of the aisles, tasking himself with searching around this part for anyone who could be trying to hide.

'Stay calm Izuku.. you can do this.. y.. you can't let these guys get away with taking everyone's stuff..' The green haired teen was thinking as he tightly clenched his fists against the shelf behind him, mustering up his bravery as it seemed as far as he can tell, he was the only one with the skills necessary to stop these robbers from accomplishing their goal. That was something he just could not allow to happen. He took a final deep breath as he looked forward with a serious expression, nodding as he began to hear the criminal approaching down the aisle to his left, preparing to make his first move as he watched one of the bottom corners to look out for his feet.

When the feet became visible, Izuku sprung into action. 'Now!' He interally screamed as he swiftly stepped out from behind the shelf and attacked the criminal quickly, the thug had no time to exclaim as his face was quickly met with the curved end of his crowbar when Izuku got his hands on it with him, the man was only allowed to be dizzy for a split second before he utterly was knocked out when Izuku had pulled the other end of the blunt weapon across his face, bringing both of them to the ground, making a loud thud, before the other robbers had the chance to spot them. Izuku then quickly pulled the man to slide him over behind the shelf and set him to sit back against the surface.

( Cue "Manners Maketh Man" - Kingsman: The Secret Service OST )

When the sounds of a loud thud and the crowbar impacting the robber's head echoed within the store, the remaining four goons perked up as their eyes widened and they seized what they were doing. "What the hell was that?" The robber with the revolver questioned as he, along with his accomplises, were all looking around at the aisles for what that sound could be.

"Beats me.. yo, where's Sousuke?" The criminal with the bat asked as he was the first to notice that one of them was missing, the others now noticing their comrade was gone now that it was pointed out.

"Sousuke! Are you alright over there?!" The remaining crowbar wielding thug called out, receiving nothing but silence.

The leader growled lightly as he was immediately beginning to feel that something was not right with this at all. His eyes narrowed over at the area for a moment before looking to his accomplice with the revolver. "Kei, go check that shit out! Something ain't right here.." He ordered darkly.

"Right away, boss." The revolver wielding thug acknowledged the order as he began to slowly make his way over to go between two shelves, gun at the ready as he was about to turn the corner. "Alright, whoever is back there. You need to-" The man could not finish off his sentence as suddenly his face was met with the crowbar that belonged to his ally, the blunt instrument having been chucked hard at him that it whistled during its swift airborne travel. The man 'oofed' as his head shot back for a split second when the weapon impacted his face, his head and body swaying in a daze momentarily before he was rendered unconscious and fell back flat on the floor with a hard thud, dropping his gun and it slid in the opposite direction of the other robbers.

"Kei!" The leader cried out urgently before he suddenly grunted in pain when a glass soda filled bottle hit and broke on his face, the surprise of the attack having his finger unintenttionally pull the trigger to his shotgun, shooting at the floor, that last shot, to his misfortune, just happened to be his last round and was now in need of a reload. The man cried and stumbled back against the cashier counter as he covered his eyes, the soda having gotten into his eyes and was burning, some of the glass getting into his forehead and cheeks.

Kyoka shrieked as she suddenly dropped the money filled sac and fell back onto her rear by the shock of the leader suddenly crying out in front of her.

"Boss!" The crowbar wielding goon cried out.

"Who the fuck threw th-" The bat wielding man was trying to voice up as well, but was momentarily stunned when Izuku had swiftly dashed out of one of the aisles and began to make a break towards them.

"You goddamn punk!" The crowbar goon utttered angrily as he stepped past his bat wielding ally to try and swing his own weapon at Izuku.

His eyes widened in surprise when the green haired teen ducked under his swing at his head, Izuku waited till the instrument went completely passed before he rose up to swing a hook at the man's clothed cheek, following it up with the elbow of his other arm after he had spun around to make it hit. When facing the criminal again, Izuku lifted a leg to kick him at the side of the head, causing him stumble sideways onto the ground, groaning as he impacted the floor.

The thug with the bat recovered as he tried to do a downwards swing at the teen. "You little-" When doing his swing, Izuku stepped up to him close enough to where their body nearly touched, the boy turned to have his back face the man, the bat, along with his hands, going over the teen's shoulders, barely missing him.

Izuku then used his arm closest to wrap it around the criminal's forearms to hold his upper limbs in place, Izuku then shot his head back to bash him in the face, which worked on making the man dizzy, his other arm's elbow coming back to strike hard the man's gut. When the man groaned painfully and leaned forward from the blow, Izuku then threw him over his shoulder when grasping onto his arms with both hands, slamming him onto his back on the floor. The teen did not stop there as he jumped on top of the man on the stomach region with his folded legs, his knees striking his gut hard at the impact, the man gasping as all the air had left him from the boy's drop, his limbs rising up as his eyes were now all white and his mouth was open wide, the man now falling limp as he succumbed to his punishment.

The man wielding the crowbar was beginning to recover, gasping as he saw his ally had been completely immobilized by the kid. His anger boiled once again as he picked up his weapon and charged at the boy. "Why you!" Izuku gasped as he pushed himself off the downed goon and focused his attention on the attacking robber.

The man began to swing rapidly at the boy, Izuku easily moving his body to dodge the anger fueled attacks at him for only a few seconds before he took his opportunity to strike back when the goon had did a upwards diagonal swing at him. Izuku used his left forearm to hold up the man's own arms to keep them in the air, then jabbing the man in the gut with enough strength to have him leaning forward with his right fist, then following his first strike with a swift punch to his chin before holding the back of the man's head down and swiping the man's arms to the side before he used his left foot to swing up swiftly and strongly behind his right knee to kick him in the face with his heel. Not stopping with that as the teen then stepped back and performed a corkscrew flip kick that struck the back of the man's head, launching him hard into the ground, letting out a final groan before he too had been immobilized. Izuku now slowly standing up proudly after he had landed in a kneeling position right by his head, smirking as he looked over his shoulder at the subdued thug.

The leader had finally managed to get enough of his sight back, his eyes widened in shock as he stood tensily by to see that all of his comrades had been beaten to a pulp by the green haired boy. He then began to dig in his pockets for an extra shell he had, quickly loading the round into the shotgun before cocking it. Now beyond angry with the predicament.

The sound of the gun had Izuku in slight fear as he looked over his shoulder to see that the man was now aiming his gun at him, gasping shakily as he stared down the barrel. 'Crap!' He frantically thought as he saw the man looking absolutely furious.

"Go to hell, you fu-ooh!"

Clank!

The leader let out a strained grunt as his eyes suddenly rolled into the back of his head as he dropped his gun and fell to the floor, starting with dropping to his knees and falling flat on his front. The thug now unconscious along with his accomplices.

( End of song )

When the man dropped, Izuku smiled as he sighed in relief as he was in genuine fear for his life for a moment there, Kyoka could be seen from behind the counter holding a black aluminum bat she had swung at the man's head that was hidden under the counter for such occasions. She panted as she looked pissed herself at the knocked out thug. She wiped her tears before she spat on the man. "Asshole.." She uttered darkly as she placed the bat on the counter and placed her shaking hands on the wooden surface, letting the relief of no longer being in fear for her own life wash over, her quivering lips curving into a smile.

Once the grounded civilians had processed that everything was gonna be okay, they all began to get back onto their feet and get back the things that were almost burgled from them. Not wasting time as they moved to exit the store, thanking the green haired boy profusely before bolting it out of the building.

"Thanks mister." The crying boy from earlier was the last to thank the teen before he was rushed out by his mother.

"Come on, Kouta honey. We got to get home." The short haired brunette mother pressured her little boy before they left themselves.

Izuku smiled as he gave a small wave to the boy before they exited out the door. After it was just him, Kyoka and the downed goons left in the store. Izuku looked in worry at the purplette as he approached the counter after he had taken a quick trip to pick up the milk he had left in the back.

"You okay.. Ms. Jiro?" Izuku asked the purplette in genuine concern, needing to take a look at the nametag to get her name to formally call to her.

Kyoka snapped out of her indulging as she looked up in surprise at the green haired teen, sighing in relief that it was just him, thinking it was one of the goons momentarily. She gave Izuku a smile as she nodded. "I'm fine.. Just glad to be alive is all." She weakly chuckled as she brushed some of her hair behind her ear. "Thanks for that by the way.. Pretty ballsy what you did, but I'm sure everyone is glad you stepped in, hero boy." She then smirked as she said the nickname.

Izuku scoffed as he held back a chuckle and looked over to the downed thugs with a agitated look. "Well I just did what I had to do to ensure everyone got out of here alive and they pay the price for what they tried to do." Izuku replied.

"Well you did a pretty damn good job." She commented, scowling at the leader as she lightly clenched her fists on the counter top. 'I'm glad I got the last hit on that prick.' She thought venomously.

Police sirens were then heard coming towards their location, causing the two of them to look over at the door by them.

"Crap, I gotta go." Izuku uttered in alert as he took out money that was just enough to pay for the milk before he bolted out of the store with haste.

"H-Hey, hold on! I never got your name!" Kyoka shouted as she leaned over the counter when Izuku dashed out. "Aaand he's gone.." She sighed with a frown on her lips as she came back from over the counter, looking to the money for a moment before placing it in the cash register, then working on returning the cash that was in the brown sac on the floor right by her.

'I hope to see you again sometime soon.. hero boy.' Were her final thoughts as a small smile flashed on her lips.

Ah ha! Another My Hero Academia story out from yours truly! I really love this series. XD Alright, before I say anything else, I just want to say that this an idea that is similar to my Fairy Tail story, it has no magic, just pure hand to hand combat to settle all scores! I've been planning to use that idea for a MHA fic for quite some time and I am now just going through with it, so that means that in this AU! There are no phyical differences of any of the characters, for example, Mina with her pink skin and her eyes, Tsuyu's frog like appearance or Tenya's engine legs. Everyone will really just look.. well, like normal human beings. Also, Quirks do not exist! Only through Martial Arts will conflicts be settled! Strengths be shown! So expect a more confident, and frankly, a pretty OP Izuku for this story! Oh, and a harem. C; Alright, I hope that this is a concept you all will enjoy for my take on this series! I know I will enjoy writing it! I appreciate you for reading this A/N! And thank you for reading!

Izuku's Fighting Styles

- Karate

- Tai Chi

- Pencak Silat

- Wing Chun

- Muay Thai

- Shaolin Kung Fu

- Taekwondo

- To be decided

- To be decided

Alrighty! Those are my seven fighting styles that I will have my Izuku being skilled with. As you can see, I will have him be knowing nine styles in total. For the last two, I'm gonna let you, the readers! Be the voters for what they could be. So PM me your votes on which other two fighting styles you want him to know!

Izuku's Harem

- Itsuka Kendo ( Karate )

- Kyoka Jiro ( Taekwondo )

- Ochako Uraraka ( Muay Thai )

- To be decided

- To be decided

- To be decided

- To be decided

- To be decided

And there is my three picks for the harem! I will have their fighting styles displayed beside their names! Even if it shows eight spots, I ain't gonna guarantee that'll be the final list. XD I will set up a poll so you all can vote for who gets a spot in the flock! You will be allowed to select two different girls! Also, if you want, you can PM me on which fighting style you wish for your chosen girl, or girls, to have! Alrighty, all I got to say for now!

Follow, Favourite and Review if you would be so kind!

Until next chapter, deuces!