(Extreme apologies for the LONG delay)
10 years had passed since that day and things had been rather busy for the young quirkless, but not powerless, boy. After the day and after his first transmutation, Izuku had continued to work with his new found power of alchemy and all the good it can do. Studying the process of breaking down the ground beneath him and reconstructing them into a new form was now as easy as breathing and in order to maximize to its full potential, Izuku decided to take self defense to improve his body's strength and agility at the age of 7, 2 years after he got the book of alchemy from his father. While he continued to train, Izuku decided it was best to put his distance away from his friend, or should he say former friend and now bully, and stay away from him or anyone else who tried to threaten or laugh at him. Even though he was lonely, it helped Izuku contribute more time to train his body and his prowess in his alchemy. Even though he could tell his mother saw his loneliness, Izuku made sure she didn't worry by saying the words that kept both of them strong over the years. (Inko's still thin if no one pieced that together)
"Don't worry, mom. I know I might not have any friends now, but I just have this feeling that one day, I'll have true friend that will accept me for me, just like you and dad."
Those words were always in their hearts and kept them strong as Izuku grew and before they knew it, it was his final year of Junior High and that was the year the world would know just what a quirkless child is capable of as we see Izuku in his class room as his teacher was holding application forms for their futures before he threw them in the air.
"But that doesn't matter since you're all gonna be heroes, right?!" he said as the class began to cheer and display their quirks, all but one quirkless but alchemy wielding Izuku.
'Somethings never change.' Izuku thought as his class was always excited about the top job in the world, being a hero.
Even though their quirks weren't above sidekick level, it was nice that they had dreams of helping people, though he could guess it was more for the money and being popular than doing good.
"Don't compare me to these weak side characters, teach!" shouted Izuku's former best friend and bully, Katsuki Bakugo.
His quirk allowed him to make explosions by igniting the sweat that gathered in his palms and the praise he got from it, lead him to become the arrogant bully that Izuku stopped associating with years ago. Even though he still threatens Izuku, he could never harm him as much due to all the training he did to become a hero.
"We both know I'm the only one whose going to be a hero from the shitty class!" Katsuki said with an arrogant smirk, causing a roar of disdain to come from his classmates.
"You jerk!"
"We have names, you know!"
What makes you think you can be a hero?!"
"How about the facet that I took the U.A. mock test and aced it?!" Katsuki said as he stood up, causing his classmates grow silent.
It was a well known fact the U.A. was the best known hero school in Japan, if not the world, and to do that well on a mock test, was a guarantee that one could become a hero. It was then that Katsuki stood up on his desk and looked up as if he was basking in the light of the gods.
"That's right, side characters! I aced the mock test and that proves that I'm going to be the next #1 hero, one that stands above All Might himself!" he said as he gave a hearty laugh, thinking that he was going to be better than the best of the best.
"Oh, that reminds me. Midoriya, aren't you also going to U.A? Possibly General Ed?" the teacher said, causing Katsuki to cease his laughter and turn to him like everyone else in class.
"Yes, I do but I plan to go for the hero course." Izuku said as he raised his head from his quirk notebook, a hobby he had taken up over the years, and smirked at his teacher and classmates.
Silence filled the room for about 3 seconds before the class busted out laughing, finding the thought of a quirkless kid going into the hero course of the best hero school. Izuku just rolled his eyes at this before turning back to his notebook, used to his classmates scorn and ignored it. He didn't bother to tell them or show them his ability with alchemy, since it wouldn't undo all the mockery they dealt to him over his life. His point only magnified when he saw a shadow appear over his desk, quickly moving out of the way to avoid an explosion from a familiar bully.
"Deku! You worthless nobody! What makes you think you can go into the hero course?!" he asked as his hands were smoking from his quirk.
"Call it a hunch." Izuku said as he stood up and kept a good grip on his book. "Just like how you'll learn that you're not as strong as you think."
"What did you just say?!" Katsuki replied his hands popping with small explosions.
"What I'm saying is that there are all sort of quirks in the world and with them, come all new abilities you've never seen before." Izuku told him as he narrowed his eyes at his bully. "So let me ask you this, what will happen when you learn that you're not or ever were as powerful as you think you are?"
This got everyone to stop laughing and consider Izuku's words, the truth of the statement got them wondering if there are any other quirks even stronger than Katsuki's that they don't even know about. Well, everyone but Bakugo himself, who reached his limit and blindly charged at Izuku. The attack was his usual large right hook, something that Izuku was all to familiar with and knew how to beat as Izuku quickly ducked under the hit and delivered a leg sweep that took the bully off his feet and flat on his back.
This shocked everyone as they didn't know that Izuku, the quirkless student who was nothing but a loner, could put someone like Katsuki, the strongest student in school, on his back.
"Do you see my point?" Izuku said as he smirked at bit at Bakugo, feeling that he should've done that a long time ago.
"Alright, that's enough, you two!" The teacher said, not wanting Bakugo to destroy the classroom in a fit of rage.
-Timeskip, after school-
After that, the day was rather calm, if not for Katsuki's death glare and a small confrontation he tried when school ended but Izuku was fast enough to avoid him when he tried something. Anyway, Izuku was now on his way home after training his body and practicing his alchemy at a junkyard that was once an enjoyable beach. It was the perfect place to train since it was private, full of materials to use i.e. the the metal from all the trash around him, and no matter what he did, he didn't have to pay for the damage he caused since it was a junkyard but when Izuku passed a crowd of people, he saw explosions being blasted all around.
'Explosions?' Izuku thought as he moved through the crowd, coming to the front to see various heroes battling bunch of sludge with a sinister mouth and eyes but as Izuku looked closer, he saw a familiar head of spiky, blond hair. "Bakugo?!" Izuku shouted as he saw his classmate in the clutches of a villain.
"You know him?" said a random person standing next to him.
"He's my classmate. How did this happen?!" he asked.
"No one knows! He must've been taken hostage and the villain is using him for leverage. The heroes have been trying to save him but they can't and the kid's lashing out to try and get out himself." the random person said as they looked back to the scene, only to see Izuku ran in front of him. "Hey, kid, wait!"
Izuku paid him no mind as he kept running to held his old friend.
'I may not like him but now even he deserves this.' Izuku thought as he moved passed on of the heroes, Death Arms.
"Huh?! Hey kid, what are you doing?!" Death Arms said as he ran after Izuku.
"Hey, slime ball!" Izuku said as he pulled his backpack off. "Let him go!"
The slime looking villain only had a second to turn before a backpack full of school supplies was into his eye, causing him to recoil a bit and lose his grip on Katsuki, who took a breath of air before coughing up a bit of sludge.
"It got you, Katsuki!" Izuku said as he pulled his classmate free from the sludge.
Both of them rolled on the ground a bit before Izuku got into a position with one knee on the ground.
"(cough) I didn't need your help, Deku!" Katsuki said as he sat up and glared at Izuku.
"Too bad!" Izuku said before the sludge villain suddenly roared in rage.
"You little rats! I'll get my meat shield if it's the last thing I do!" the sludge villain said as he threw himself at the kids just as Death Arms got in front of them.
"Look out!" he said before he suddenly saw the pavement in front of him shoot up and block the villain.
"AAHH!" the villain let out as he hit his sludge face against the stone wall. 'Where did this come from?!' he thought as he didn't see Izuku had a smile on his face.
"Got you." Izuku said as Death Arms and Katsuki turned to him, seeing his hands on the ground and sparking with a bit static..
"This was your doing?" Death Arms asked in surprise.
"You have a quirk?!" Katsuki asked in anger and shock.
"Yes, I did and no, I don't have a quirk." Izuku said before clapping his hands together and slammed them on the ground again.
The stone wall the the sludge villain splatted against soon began to stretch and trap the villain in a perfect cube.
"What I have is something ancient and powerful." he said as he got up and retrieved his backpack, gathering his scattered school supplies as the crowd and the heroes present were stunned in silence.
After gathering his things and seeing the media arrive with an ambulance, Izuku decided it was time to take his leave before question was asked, so as everyone was paying attention to the news crew arriving, Izuku took the chance to quickly slip back into the crowd and head home.
"Hey, kid! Wait!" said a hero wearing purple and covered in wood, the rookie hero, Kamui Woods.
"Why the heck is he leaving so fast?" Death Arms wondered as he helped up a still stunned Bakugo, who soon came to his senses and began seething in rage.
"Deku..." Katsuki mumbled as he was escorted to the ambulance for a check up.
Later on that night, after returning home and explaining why he had come home late, Izuku was in his room reading the book on Alchemy he got when he was 5. Going over any and all information in the book in case he wanted to ever use another one besides his Full Metal style, he had been doing this in his spare time whenever he wasn't training, eating, at school, jotting in his quirk notebooks, or doing his homework. He did this so much, the book had been engraved in his memory since he was 12 and now he was just doing it out of habit but it's still good to always remember the basics.
"Izuku?" Inko asked as she knocked on his door, stopping him from getting to the section about using alchemy to heal small wounds. "Can you come out here? You have a...guest."
"A guest?" he asked himself but that's not possible since he, sadly but it still didn't bother him, didn't have any friends.
Izuku shrugged his shoulders before bookmarking his place and exiting his room, walking down the hall to the dean to see his 'guest' but who was there was someone Izuku least expected. The person who was standing in the dean apartment, was the person he saved, Katsuki Bakugo.
"Katsuki?" Izuku asked as the boy in question just growled at Izuku.
"I only came here to make a few things clear!" Katsuki shouted as he pointed at Izuku. "I didn't need or ask you to save me and I wanna know why you hid your quirk?! You think you're better than me because it's more powerful than mine?!"
A sigh escaped both Izuku an Inko's mouths, as they felt this was going to be the standard response from someone like Katsuki Bakugo. Even if they told him the truth, it's not like he would believe them, no one would unless they did the amount of research Hisashi did, Kami rest his soul.
"I told you, it's not a quirk. What I have is something that's even older than quirks and how I learned about this, was from this." Izuku said as he showed Katsuki the book he got 10 years ago. "This is an ancient book on a scientific power called "Alchemy" and certain individuals were trained in it over 1,000 years ago. Before my dad died, he found that one of my ancestors could use it and that's how I'm able to use it."
Katsuki stared at Izuku for a few moments before getting even angrier.
"WHAT THE HELL ARE TALKING ABOUT?! WHAT KIND OF BULLSHIT ARE YOU TRYING TO SELL ME?!" he shouted even louder as he marched to Izuku and reached for the book, only for Izuku to quickly pull back with the book in hand. "There's no way in hell that a ridiculous power like that is real! You're just making stuff up aren't you?! Just trying to throw me off just to keep feeling like you're better than me, aren't you, you worthless Deku?!"
"That's enough!" Inko said as she stood up and walked over to them. "Now I let you in because I assumed you just wanted answers but now I see that's been a mistake!" she then stopped in front of Katsuki and blocked his view of Izuku, placing her hands on her hips. "Now, I believe it's time for you to leave. Right now!"
This caused Bakugo to flinch but not out of fear, out of shock, since he never saw the woman he sees as an aunt ever get angry or yell before. He didn't think about it much, but he guessed Hisashi's death affected them more than he cared to think.
"Tch!" Katsuki let out as he turned and walked way. "Whatever, say what you want! Just stay the fuck out of my way!" he said as he slammed the door behind him.
Inko let out a sigh as she turned to Izuku, who just rolled his eyes as Bakugo's Bakugo-ness.
"He's even worse than you told me he was." she said, having remembered when Izuku gained enough confidence to tell her about the bullying.
"Yeah, you get used to it, but I'm not gonna stop." Izuku said as he gripped his book tighter. "Nothing is going to stop me from becoming a great hero, not him or anyone else."
Inko smiled at Izuku's resolve, thinking of how proud her husband would be if he could just see Izuku now.