Author's note: Hey everyone, Fire Slash here and welcome to another chapter of Iron Deku. Once again, I'd like to thank everyone who has shown support for this story. It means a lot to me that so many of you like this story and wish to see it grow. I apologize for the late update, but not only do I have a summer job, but I'm writing my own book as well. Once I get further into it, I'll give you more details. I have not abandoned my fanfics though, so there's no need to worry about that. In fact, I have a Sinister Six/MHA fanfic planned which'll basically be the opposite of this one. In it, Izuku will design a suit if armor utilizing the abilities of six members of Spider-Man's rogue gallery (Rhino, Vulture, Shocker, Doc Oc, Mysterio, and a watered down version of electro) to fight the top ten pro heroes. By beating them, he hopes to prove that the quirkless are as capable of being heroes as eveyone else. It'll also be a Jirou x Izuku fic for those of you who like rare pairs (why they get together will be revealed once the story comes out). I also have an idea for a story about Izuku being the son of Loki, twin brother of Hela, and receiving Strombrealer, but that'll be written once I finish one of my current fanfics.

Anyways, enough with the self advertisement; let's get into the story. Review and enjoy :-).

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It's been a day since Izuku confronted his childhood bully and said bully was still absolutely furious at their little chat. How dare Deku talk back to him! The fucker doesn't even have a quirk. Meanwhile, Katsuki had one most pro heroes dreamed of having themselves. He was at the top of the latter, a place he rightfully deserves, while Izuku should be lucky the two even share the same air. Nothing that idiot does will move his position, no matter how many shitty robots he makes.

'Next time I see him, I'll crush him,' the explosive boy thought bitterly. 'I'll make him see how pathetic he really is. By the time I'm done with him, he'll be begging to drop out of U.A.'

The fact he was even admitted to U.A pissed him off even more. Katsuki was supposed to be the only one from their middle school to have gotten in, but of course that fucking Deku had to ruin that for him. He'll be gunning for the hero course now, and there's no way he'll let him in, especially since he has a way to stop the quirkless genius. All he needed to do was make sure he didn't win the sports festival U.A hosted every year, seeing as students can apparently move up to the heroics department by doing well in the festival. If he does do well, he'd be the first from the support department to take heroics (the reason Katsuki knows this is because he did his research about U.A, so back off), and that'll piss him off even more. Such a large step would make Izuku a hero in the making to those around him, something Katsuki definitely didn't want happening. There's only room for one hero who attended their middle school and that was him!

Well, it shouldn't be too hard to stop him, right? Definitely not…

Well, that's something he'll need to worry about later. Right now, there's a round faced extra he needs to take care of. With today officially being the first day of classes, the boy was currently in Hero Academics 101. Taught by none other than the number one hero himself, All Might had them start off with combat training. Basically, his job was to protect a fake bomb in one of the mock cities used for the entrance exam. He had been paired up with some idiot with a stick up his butt whose quirk allowed him to run fast, but like everyone else in his class, he was cannon fodder. He simply left the elitist fuck with the bomb while he hunted down round face. The girl he dubbed 'round face' had a quirk which let her remove gravity from anything she touched…something like that, and she was tasked with retrieving the bomb. Sadly, as the class had an odd number of students, she had to go by herself. It didn't mean he was going to go easy on her. Fuck that! Katsuki was angry and needed to release that stress!

Unfortunately, she's been proving herself to be quite the evasive target. He only managed to get three clean hits on her. Even worse, her damn costume hadn't been damaged yet despite taking three powerful explosions. Thankfully, it didn't negate the damage, allowing her to still feel the strikes, slowing her down. In addition, Katsuki's offense was far superior than hers, meaning she couldn't tag him with her quirk.

"Fucking stay still round race!" The boy yelled, aiming another blow at her torso. Of course, she dodged it and attempted to tag him, only to be swatted away.

It should be known at this time that the girl Katsuki was fighting was the same girl Izuku was assigned to create a costume for, Ochako Uraraka. To be honest, the girl was acting on pure adrenaline, afraid out of her mind. Not only was she going up against the boy who scored the highest on the entrance exam, but he seemed more pissed than usual.

The only reason she was able to function was because of her hero costume. The thing had so many features in it that she didn't ask for, but she was more than glad to have them. The infrared vision in her helmet was what prevented Katsuki from landing a surprise attack on her while the costume's durability had allowed her to take hits that would've otherwise knocked her out. According to the note she got from Power Loader apologizing for how complex one of his students made the costume, it also allowed her to breathe in areas which lacked oxygen, but in this fight, that feature was pretty useless in this fight.

'He's not slowing down,' Ochako thought to herself. 'And I'm almost at my limit…'

*Ding*

'Huh?'

A small red light flashed as a weird chime echoed around the two. Glancing at Katsuki, she saw him raise one of his arms at him, some sort of grenade shaped gauntlet pointed at her. Did she mention that he had a feral grin plastered on his face?

"You've wasted too much of my time round race," Katsuki snarled before glancing at his gauntlet. "But now it's time to end this. This piece of equipment here has been storing up my sweat as we've been fighting and now that it's full, I can test out this bad boy. If they made it the way I asked them to, you won't be standing for long." Immediately, Ochako began backpedalling away from him, trying to avoid the shot. Sadly, after yelling 'die' at the top of his lungs, Katsuki unleashed a full blast at her. The last thing Ochako saw before passing out was her body being engulfed by an immense amount of flames…

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When Ochako regained consciousness, the first thing she did was take a quick glance at her surroundings. What she discovered was that she was at the school's clinic and her friend Tenya Iida was seated next to her. Groaning in discomfort, the girl sat up from the bed she was laying on and turned to her friend.

"Iida? What happened? What are you doing here?"

"You were knocked unconscious by Bakugo," he told her. "He was reprimanded by All Might for excessive use of force, but otherwise he wasn't punished for his actions. I decided to watch over you because I feel as if this was partially my fault. If I hadn't let Bakugo go after you alone, this wouldn't have happened."

"Don't worry, you could have known something like this would've happened," Ochako reassured him. "But tell me, how bad is it?"

"Huh?"

"I've been shot by a massive explosion. How bad was I damaged?" Ochako asked, honestly expecting to be disfigured in some way. Tenya's response surprised her.

"Thankfully, you have no scars or burns. According to Recovery Girl, your hero costume protected you from an otherwise fatal shot. Your costume is another reason why Bakugo got off so light."

Glancing at her body, she noticed she was still in her hero costume. Much to her surprise, it was only slightly singed. She knew her costume had been upgraded based on the letter from Power Loader, but the fact it was this sturdy was impressive to her.

"I must admit, whoever designed your costume clearly possesses a vast amount of intelligence," Tenya admitted, verbalizing what Ochako was thinking. "The same thing goes for my costume. The person, Mei Hatsume I believe their name was, had upgraded my suit drastically from its initial design. Did she perhaps make your costume as well?"

Ochako shook her head. "From the letter I got, it was a boy named Izuku Midoryia."

Tenya nodded. "Both clearly have a grasp of what they're doing in their field. I would like to meet them one day and personally thank them for their services. I feel both will become great support units for heroes."

Taking another look at her costume, Ochako couldn't help but agree. If Midoriya's suit was able to protect her from a devastating attack like the one Bakugo launched at her, there's no telling what he could do with a few more years of practice. "Hey, do you know where the support lab is?"

"Yes, why do you ask?"

"I want to see if Midoriya's there so I can thank him for the costume. It's a bit late and he probably went home, but it doesn't hurt to check, right?"

Tenya smiled at her. "Indeed it does not. I'll gladly take you to the support lab. Recovery Girl said you may leave whenever you like."

"Alright. I think I'm good to go." Standing up, Ochako felt a small wave of fatigue hit her, though it wasn't enough to affect her balance in any way. Seeing as his friend was alright, Tenya began leading her to the support lab, eager to meet the geniuses behind the suit.

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"Hey, put in already!"

"I'm trying, but it's too damn tight!"

"Just use more force and shove it in!"

"You sure, I might break it?"

"I'm sure. Now thrust that bad boy inside! I'm begging you!"

"Alright, here it goes…Nggh!"

"Yes! Just like that!

"…I think we should leave…" Ochako stated with flushed cheeks as Tenya and her stood outside the support lab, hearing…whatever was happening inside. Tenya simply stood by her side, mouth hanging and his face a bright red.

"How dare those two use the support lab for such indecent activities! Don't they know this is a place of learning?!"

Ochako was about to reply, only to hear something snap inside the room, a male voice groaning in frustration.

"Great, the pipe's broken. Told you that it wouldn't fit…"

"Yeah, yeah. Just pass me the laser cutter already and I'll make the hole bigger."

"Alright, where is it again?"

"It's in my bag. Just don't destroy anything in there."

Hearing this made the two teens sign in relief. Not only will they no longer have awkward thoughts for the rest of the day, but the two could enter the support lab without worry. Taking advantage of this, Ochako knocked on the door, it swinging open a few seconds later to reveal Izuku in his Mark Mini.

"Hey," the boy greeted somewhat shyly. "If you're looking for Power Loader, he's in the Faculty Lounge…"

"Oh, we're not actually here for him," Ochako replied with a smile, causing the boy to give her a confused glance.

"Huh?"

"Yeah. We're actually here to see if Izuku Midoriya and Mei Hatsume are still around."

Hearing this honestly surprised Izuku. What on Earth did these two strangers want with him? "Well, I'm actually Izuku Midoriya and Hatsume's inside the lab. You guys can come in if you want."

Taking his offer, Ochako and Iida allowed Izuku to guide them inside the lab, eventually running into Hatsume, the girl working on what appeared to be some sort of hydraulic press. Tapping her shoulder, Izuku pointed his thumb at the two heroes in training.

"Mei, we got company."

Hatsume quickly turned around. "Hiya! Are you guys looking for some babies?"

Tenya choked on his saliva. "B-babies?!"

"She means her inventions," Izuku explained. "She treats all of them like they're her kids."

"O-oh. If that's the case, then we're fine for now." Straightening himself out, he then bowed to the two inventors. "Allow me to introduce us. I am Tenya Iida and next to me is Ochako Uraraka. We are students from class 1-A and we would like to thank you for the upgrades you have made to our costumes. They will certainly aid us in our journey to becoming pro heroes."

"U-uh, no problem," Izuku replied. He wasn't expecting a 'thank you' for the suits, especially in such a professional manner. He thought they'd just ignore the letters Power Loader sent out with each costume. "You didn't really need to thank us. It was nothing really…"

"No way! Your upgrades seriously saved my butt earlier today," Ochako passionately declared. "During hero practice I was hit by a large explosion and if it wasn't for you, I'd probably have third degree burns right about now."

Hearing this made Izuku's mood drastically change. Where he was acting a bit awkward before, he now had an angered expression plastered on his face. This came as a surprise to the two heroes in training while Hatsume immediately knew what about the conversation triggered such a mood shift.

"A big explosion, huh? Mind telling me the name of the person who hit you with such an attack?"

"His name was Katsuki Bakugo," Tenya replied, causing the boy to roll his eyes.

"I knew it," Izuku growled before turning to Tenya. "Did he hit her as hard as she said he did?"

"Yes. If it wasn't for her suit, then Uraraka's condition would've been far worse."

Izuku clenched his fists in anger. Looks like his childhood bully really didn't know the meaning of restraint. "Please tell me he was punished for being so reckless…"

"He only received a warning," Tenya told him. "Pardon me for asking, but it seems you harbor some ill feeling towards our classmate. Might I ask why this is?"

"Let's just say he picked on me for being quirkless and was a big bully ever since he developed his own quirk," Izuku said, telling them the shortened version of their history.

"That's horrible," Ochako declared, questioning how a bully like him was able to get into U.A. "How come the teachers never did anything?"

"Who'd listen to the quirkless boy? We're often pushed to the side by everyone else. It's just how it's been."

"And they dare call themselves teachers," Tenya scoffed.

"Well, even if you don't have a quirk, you're still amazing!" Ochako stated. "You're a genius after all!"

"Heh, thanks," Izuku bashfully said, glad to see they weren't like the people in his past.

"Pah, calling Izuku a genius is an insult to his intelligence," Mei stated. "If anything, he's gifted with something no one else has!"

"Mei, please…" Izuku whispered to her, not liking it whenever she bragged about his intellect. "If anything, you're the gifted one. How you manage to come up with so many ideas is impressive."

"Yeah, but you're better at making your ideas come to life…"

"The fact you two hold one another in such high regards makes me believe you'll go far in the support department," Tenya informed them, impressed with what he's seen from the two.

"Thanks, but Izuku's not really aiming to work as support," Mei informed them.

Ochako gave Izuku a confused glance. "Wait, so why are you in the support course?"

"Well, the support course will aid me in my real dream," Izuku told her.

"Which is?"

"I want to become the first quirkless hero," Izuku declared confidently. "I'm aiming to be a part of the hero course as well."

"That is a noble dream," Tenya told him. "But you said you were aiming to be a part of the hero course and support course as well, correct? How would you go about doing that?"

"Well, if someone does well in the famous Sports Festival U.A hosts every year, they can move up to the heroics department," Izuku explained. "For business and support students, they'd take their regular classes as well as the hero training classes you guys have to take. Since the rest of the departments end an hour earlier than the hero classes, it works out. I can also dump the support course entirely, but since I'm quirkless, I have to rely on my brains and gadgets to help me in combat, which is why I'll be sticking with support."

"Wow, you've clearly thought this through," Ochako said, admiring his determination. "So, what type of stuff have you made to help you?"

"That's a secret," Mei replied, answering for Izuku. "But let's just say it puts the costumes we made for you to shame."

"Well, whatever it is, I can't wait to see it," Tenya admitted. "And I cannot wait to see you in the heroics department."

"Thanks," Izuku said with a smile. "I hope that when I make it, I'll be in the same class as you two. I have a feeling that you two will make it far as heroes."

Tenya smiled back at the quirkless genius, his words filling him with confidence. "I'm glad to hear that…"

0000

"Izuku! It's done! It's finally done!" Mei shouted in glee as she picked up a metallic shield. "Our greatest baby to date is finally here!"

"Yeah, I can't believe it," Izuku replied, smiling at both the shield and his fellow inventor. Two days after Ochako and Tenya had visited the two inventors, Mei and Izuku had finished making another scientific breakthrough and were ready to test their new creation. About five months before the entrance exam, Mei had eagerly approached Izuku with a new idea; create a new type of element that would be stronger than anything out there currently. The idea of making a new element was all that was needed to bring Izuku on board and the two have been using most of their free time since that day to perfect their new creation. Now, after several sleepless nights, they finally created the strongest metal to ever exist. Dubbed Vibranium, it had the ability to withstand an immense amount of force by distributing it around the metal. Seeing as Vibranium's utility was primarily in defensive situations, the two decided to create a simple defensive support item with the metal. In the end, they chose a shield as nothing else screamed more basic than a shield.

"Let's test it already!" Mei eagerly declared, snatching the shield and sliding it under the hydraulic press the two had created. Thankfully Power Loader allowed them to leave the machine there as long as it didn't cause any destruction.

Nodding, Izuku pulled out a remote from his pocket. "All right, how strong do you want this thing to be?"

"Maximum power!"

"You sure? At max, this press exerts fifty percent of the force All Might can…"

"We designed this thing to be nearly unbreakable. If it can't survive this, then we might as well start from scratch."

"You're right." Pressing a button, Izuku activated the press at maximum power. The two watched as the press continued to crush the shield for about a minute. Eventually, Izuku turned off the machine and pulled the shield out, glad to see it was still in tact. "Well, looks like Vibranium can take fifty percent of All Might's power."

Mei jumped in excitement "Yes!"

*Knock. Knock.*

The sound of someone knocking at the door cut their celebration short. Leaving the shield with Mei, Izuku opened the door, only to be met face to face with Mirio Togata. Even though Izuku has only been in this school for about four days now, knew about the third year student standing in front of him. Mirio was a part of the Big Three, which were the strongest students in the school. Not only that, but it was believed he had the best shot at becoming the next symbol of peace, even more so than any pro hero.

"Hi!" The blonde boy greeted with a big smile, snapping Izuku back to reality. "I was told by Power Loader that Izuku Midoriya and Mei Hatsume would be here."

"Mei's inside, what can I do for you?" Izuku questioned, wondering what the most powerful student in the school wanted from a first year like him.

"Well, I need a new costume," the boy admitted before explaining his situation. "My quirk makes it so that I can go intangible, but only me, which means whenever I use my quirk, my costume ends up falling off and I go naked. It's kinda annoying and I've been bothering Power Loader for a new costume for almost two years now. When I asked him about it today, he said you two might have a solution. In his words, you two are 'the best damned inventors' he's ever met."

"Nice to know our reputation precedes us!" Mei shouted from the back of the room, all while Izuku smiled at the praise. It was nice being somewhere where your talents were appreciated.

"I'm guessing you want something that goes intangible with you, right?" Izuku asked, the other boy nodding eagerly.

"Yep! So, can you do it?"

"Yeah. It shouldn't be too hard," Izuku stated. "We just need something from you. Mind coming into the lab for a second?"

"Not at all!"

Leading Mirio to the back of the room, Izuku quickly whispered something to Mei, the girl running off to fetch something from her bag a second later. What she ended up grabbing was what appeared to be radar gun.

"Uh, what's that for?" Mirio curiously asked.

"It's to track the pheromones released by your body," Izuku informed him. "Unless you're quirk is a mutation quirk, your body releases a special type of pheromones whenever you use your quirk. It's what Eraserhead's quirk shuts down when he erases a quirk. What we're going to do is scan the pattern you pheromones produce when you use your quirk. With that, we'll create something that goes intangible as a direct response to being around those pheromones."

"Woah, that's incredible!"

"Mei was actually the one who thought of mimicking the patterns of the pheromones released by a quirk," Izuku stated before pointing the machine at him. "Now, whenever you're ready, use your quirk."

Nodding, Mirio quickly faded into the ground before resurfacing back into his clothes. Silently admiring the control the older boy had over his quirk, he recorded the results.

"Anything else you need?" Mirio asked.

"Well, other than the design of your costume, that'll be it. We should have your costume done by tomorrow."

"Sweet!" Digging into his bag, Mirio pulled out a crumpled paper, straightened it, and gave it to Izuku. Glancing at it, the boy saw a drawing of Mirio's costume design. "Thanks you two! I'll be back to pick it up after school tomorrow!"

'No problem." Watching Mirio run out of the lab in excitement, Izuku turned to his fellow inventor. "So Mei, how do you feel about staying up all night for the fifth time this week?"

The girl's eyes began to gleam in a mischievous manner. "Oh Zuzu, you know me so well."

0000

After an entire night of working on the costume, Izuku and Mei had perfected Mirio's costumes, being the prodigies that they were. When Mirio arrived to pick it up, he was ecstatic.

"Holy moly! This looks great!" Mirio declared as he held the costume.

Izuku smiled at the fact he was able to replicate the original design. "Thanks. Now try turning intangible."

Nodding, Mirio did what he was told, shocked to see the suit remain in his arms as he went underground and back. "Hah, you guys really did it! You're really something else! If there's anything I can do to pay you back, please let me know!"

Mei smirked as she saw Izuku's eyes shine in determination. "Actually, there is something you can do…"

"What is it?"

"Even though I'm in the support course, I'm aiming to become a pro hero. The thing is, I'm quirkless, so I had to design a suit of armor to compensate for my lack of a quirk. I've designed it to be able to fight against villains with quirks, but I haven't tested it out against someone yet, and who better than the strongest student in U.A. If it's alright with you, I'd like to spar."

Mirio smiled at seeing the boy's determination. "I'd be glad to help you."

Izuku's grin extended further. "Excellent. Meet me at the training grounds Monday after school…"

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Author's note 2: I'm now on Instagram if you wanna follow me. My account is Fire_Slash_Fanfiction. I'd love to speak to you all.