How it all started

The dark figure moved through the streets of Musutafu, it had just finished killing Tensei Ukata, he left no trace for the police or the heroes to track. He made his way silently, he used to shadows to move silently and not caught the attention of anyone.

The figure finally reached its destination, an abandoned warehouse in the outskirts of Musutafu. The figure entered and took out his cloak to reveal a green haired teen.

Izuku: What a productive night!

He sat in the broken couch after taking off the rest of his costume. He then stood up after a few minutes.

Izuku: Hungry...

Izuku went off wandering in search of a store. Once he reached it he entered it and bought a few chips and coke.

Izuku: 'That gang boss had alot of money on him! How lucky I am!'

Izuku the went out of the store and headed back. As he went back he paased through a street near where he had killed the gang boss. It was full with a crowd of people and police all around.

Izuku: 'Well they must have found him already, I better take a detour'

He then wondered off into another part of the city but then he got into a familiar street...

On that same street 6 years before.

We can see a 10 year old Izuku going with his mom on a walk. It had been 6 years since he had been diagnosed as quirkless, he didnt care. His mother still loved him so that was good enough for him. They were walking in the street after having watched the new All Might movie.

Izuku: Mom! Mom! Did you see him! He made pum pow and smash! And then everything went boom! It was so buaaaa!Inko: Yes yes darling! It was incredible! Let me tell you this, waht do you say if I buy you one of the new figurines of the movie?Izuku: What reaaallyyyyyy??Inko: Yes son really.Izuku: I love you mom!Inko: I love you too darling.

Izuku was more aware of his condition of quirkless, and was more aware of the dangers of that career. He decided to give up on being a hero for the sake of his mother. He loved her too much too see her worried. He still liked heroes and thought he maybe could still apply for UA in the other departments instead of heroics. Bakugo still bullied him, but just not as much.

As they were walking down the street, suddenly explosions could be heard all around the city. Izuku looked around and saw All Might fighting with some guy in a suit.

All Might: I will get you this time! All for One!

All Mighy yelled at the top of his lungs.

Izuku: Look Mom! All Might! And he is fighting!Inko: Yes its cool... But it is best for us to go away, we dont want to get involved in All Might's fight.Izuku: Okay

Inko and Izuku began to walk away. All for One and All Might clashed, releasing a massive shockwave, which made Inko and Izuku fell over. Suddenly All for One threw a boulder into All Might, he dodged, but the boulder fell on Inko's legs, trapping her.

Inko: Izuku! Run!Izuku: Mom! Mom! I wont leave you!

All Might threw a punch into All for One, which he also dodged and the wind pressure reached Inko, obliterating her into pieces.

Izuku was only able to watch how her mother died a painful death infront of her, her body parts raining over her. Suddenly a police officer eeached where he was.

Police: Kid what are you doing here?!

Izuku could only point to the pile of flesh that was now his mother.

Izuku: My mom....

The policeman paled at the sight, he then gained his composure.

Police: Come on we have to get out of here!

The policeman grabbed Izuku and ran away with him. Izuku watched slowly as the remains of his mother faded into the distance.

At the police station.

Izuku was sitted on a chair, he watched the news with a serious expression as they announced All Might's victory against the mysterious villain.

Detective Tsukauchi entered the room and talked with the secretary.

Tsukauchi: So this is the kid?Secretary: Yes, his name is Izuku Midoriya, he is 10 years old and quirkless. His mother died on the battle and his father is far away. He also has no other known living relatives. We will have to send him into an orphanage.Tsukauchi: Poor thing...

Tsukauchi then went to Izuku.

Tsukauchi: Hey kid.

Izuku looked up to Tsukauchi with lifeless eyes. Tsukauchi was disturbed by the image.

Tsukauchi: Look kid, we will have to send you to an orphanage as there is no one with who you can stay with.

Izuku widened his eyes.

Izuku: No... No... I will not go there I will not!Tsukauchi: Kid calm down!

Izuku jumped off his seat and kicked Tsukauchi in the balls. He then ran away from the police office, he ran as fast as his legs could go. He ran around the city not knowing where to go, just wanting to go away. He then reached an alley where he kneeled down crying. Suddenly a figure entered the alley and looked at the kid.

???: Hey kid what are you doing here?Izuku: I ran away from the police...???: A kid like you? Why?Izuku: I kicked an officer in the balls.???: Ouch... Okay... But why?Izuku: He wanted to throw me into an orphanage.???: What happened to your parents?Izuku: I dont know where my dad is, and my mother who lived with me died today during All Might's battle.... Stupid All Might....???: Hey kid what do you think about the heroes?Izuku: I hate them! Also the villains! The go around fighting with their quirks killing and causing damage without a care in the world while we just have to suck it!

The man smiled.???: Do you want vengeance?Izuku: Yes!

He extended his arm.

???: Then come with me, I can help you with that.Izuku: Really????: Really.

Izuku stood up and grabbed his hand.

Izuku: What is your name mister????: I am Akaguro, but you can call me Stain.Izuku: Thanks Stain sensei.

For the next six years, Izuku trained with Stain, becoming a master of swords, guns and other types of weapons, as well as martial arts. By the time he was sixteen he had a small chat with Stain.

Izuku: Sensei.Stain: Yes?Izuku: I think I need to go, I want to do things my own way and also I know you beleive All Might is the only true hero, but I want to kill him.Stain: Oh then I wish you luck my student!

Izuku from then on was independent, he found an abandoned warehouse which he made his base. He then used whatever materials he could find to make his costume. Finally after a week he was ready to start his crusade.

He went off from roof to roof on the dark of night. Soom he saw a villain vs hero fight. It was the hero Laseron against a guy who could turn his body into rocks. Laseron would summon lasers from his eyes at will. Izuku jumped down. Laseron and the villain turned to him.

Laseron: A vigilante?Izuku: Worse than that.

Izuku had learnt how to change his voice.

Laseron used his quirk to attack Izuku, but he used his sword and deflected it towards the villain. The laser pierced his shoulder. Laseron stopped using his quirk and Izuki charged at him using almost inhuman speed. He slashed his eyes, cutting them out. He the stabbed him in the throat. Laseron was dead. He then took out a shotgun and pointed it at the villain, he shot the villain who had activated his quirk time and time again until the only thing left was a pile of rock dust. He then used Laseron's blood and drew a giant circle on the wall and wrote a V in the middle.

And that night, The Vengeful One was born...