Hello, its RobLebron. This is my first fanfic I've been itching to work on. Hope you enjoy it. Rate, Review, and have a nice day.

Chapter 0: Pain's Origin

My name is Kazume Akaguro. People will mostly know me as the Powerful and Indestructible Ninja or "Pain" for short. I am the younger brother of Chizome Akaguro, also known as the legendary Hero Killer "Stain", which is an acronym for Super Talented Assassin and Intimidating Ninja. Before my brother became a murderer, he always wanted to become a true hero like the Number 1 hero All Might, however, he dropped out of UA the year that I was born and was forced to do hero work undercover. You see, in this society where 80% of the population have a secret supernatural ability called "quirks", a hero must have a Provisional Hero Licenses to legally used their quirk in times of danger to either fight villains or save innocent lives. I used to live a happy with my mom, my dad, and my brother living in an apartment in Hosu, going to a public elementary school, and my brother would always pick me up and take me home. Life was going so well for the both of us…

Until one day...

Five years ago

It was a day filled with chaos and destruction. My brother and I were on our way home after picking me up from school, but the both of us saw a very scary site. An entire street filled with knocked down buildings, cracked streets, shattered sidewalks, and apartment buildings that were on fire. The entire hero corporation arrived and helped the panicked citizens evacuate the scene, but I was devastated to see my apartment on fire. The fire smelled like burning flesh, meaning people were unfortunate to escape the fire and suffered a tragic and blazing death. Despite all that, my body moved without thinking and tried to go inside my burning down apartment, but someone tried to stop me from doing something stupid. An old hero with a yellow cape known as Gran Torino tried to prevent me from saving my parents.

"What are you doing kid, it's too dangerous to be out here, you need to get out of here," said Gran Torino.

"My parents are stuck inside the burning down apartment. Can you please save them?" I asked as I start to burst in tears.

Gran Torino put his head down in guilt as he picked me up and returned me to my brother and said, "I'm afraid I cannot at this moment. There are other matters we heroes must take care of like defeating this menacing villain."

'What villain', I thought as my brother and I ran away from the scene until I saw in the distance a blonde muscular man knocked back into a building. It was All Might, putting his life on the line defeating a very powerful villain.

I was crying myself to sleep but not before I told my brother, "Brother, I don't think the heroes are gonna save our parents in time."

My brother, who was displeased with the lack of the heroes' effort into saving our parents replied in a dark tone "I know."

And before I was out cold, I saw a scary image of a bald man in a business suit wearing a black mask. It was at that moment I realized that he was the villain that caused all this chaos… the villain that killed our parents.

Aftermath

A day has passed since the ultimate chaos has affected Hosu, a day after our parents died. I woke up in a hospital bed and my brother slept in a chair alongside me. I believed he took me to the hospital since I tried to enter a burned down apartment building and my brother wanted the doctors to make sure I wasn't exposed to carbon monoxide due to my stupid act. It could be that, or he found us a place to crash for the night now that we have no home and lost our parents. We are on our own now.

On the bright side, a news report came in on television explaining the aftermath of the big disaster that occurred in Hosu. It turns out All Might was able to defeat the powerful villain and ended his wrath, bringing back hope to the people. Although he was able to save millions of lives from the dangerous villain, he was not able to save two people that are suffering despair due to lack of effort into saving their parents…not able to save us from despair.

He not only created a brighter future for the citizen, but also created monsters.

"This society is filled with fake heroes. A society filled with nothing but a bunch of bullshit," my brother groaned.

"What are you saying brother," I tried to reason with him.

"Open your eyes Kazume! Those FAKE heroes didn't even bother trying to save our parents. A true hero would have sacrificed his or her life to go inside that fire and look for our parents. Instead, they are too chicken and believed the lives of our parent mean so little for them to save. This society needs a big reset and I'm gonna get to the bottom of this" My brother said.

'He's not wrong, why didn't the heroes save my parents who were trapped in the fire' is what has been circling in my mind as my brother continues explaining his plans.

"From now on, I will rid off all the false heroes that do it for the money, women, and popularity. The only true hero in this piece of shit society is ALL MIGHT." My brother yelled his name as a battle cry.

And then he asked me a question that I will regret answering, "Are you with me brother?"

'Like I have no other choice, but I do agree with his belief. I did want to grow up to be like my amazing brother after all,' I thought before I replied to him,

"I'm with you brother." _

And that was the day All Might has created two monsters named Pain and Stain, The Hero Killer and his accomplice, who will soon cause fear and death to false heroes. Together, both assassins were responsible for career-ending injuries to 15 fallen heroes…

Until one day…

Three years ago

"Finish him!"

Here we are, working together as a team to pick off false heroes one by one. Our plans have always been the same. Since we are wanted criminals on the loose, we would let heroes look for us and they always find us in the same dark alley somewhere in Hosu. I would either corner myself to make them think I was vulnerable, so Stain can catch them off guard to make a sneak attack on the hero, or either one of us go one on one with the hero. Either tactic would always end with the same result: one cut, a good swallow of the blood, hero gets paralyzed, and lastly, we do the dirty work. I could think of many bad things we can do to the false hero that could end his or her career of working in the streets as a hero.

However…

Killing one? I would never believe that this shit society gotten so low to the point where I would have to cross the line to kill the hero. What if that hero has a family? A loved one?

'No, I can't do this. I don't want to kill somebody' these thoughts have flooded my head as my brother started getting impatient.

"What's taking so long? It's just one slice through the neck and we're done here. Besides, heroes and police will be looking for us, so we don't have much time to waste. END THIS SHITTY HERO ALREADY!" He ordered.

"No! I won't do this. I would never murder somebody. This is not what our parents would have wanted. For us to become murderers."

"THAT'S IT!" He groaned.

He shoves me out of the way and pulls out one of his katana, ready to behead the false hero.

"NO!" I screamed.

*SSLLLICEEEE

It was too late. Game over for the fallen hero. No retries. No continues. R.I.P

"Let's go." He ordered. But I refuse to follow a fucking murderer.

"No! I'm done working with you. I will never help you end another hero's life ever again." I revolted.

*SLLLLIIICCCEEEEEE

"AHHHHHHHHHH! WHAT THE FUCK BROTHER!" I screamed in pain as he sliced his katana right between my eyes, my nose, and my mouth.

"You're no longer my brother. Don't bother coming home." He replied before he left me to bleed out.

'So, this is it. This is how my life ends? This world is so cruel. These false heroes didn't bother saving my parents, so why would they bother saving me? Hell, who would bother saving a villain like me? I'm sorry mama and papa. I won't get to join you in heaven. I'm going somewhere much worse,' I said my final thoughts before I die.

…Or so I thought.

"Fear not kid. Why? Because I AM H- HOLY SHIT WHAT HAPPENED HERE?!" Asked the number 1 hero All Might.

I felt glad that someone came to save me, and I felt confused why my savior freaked out. Oh right, cause behind me was a disturbing sight of a beheaded hero and my bleeding face.

"No time to lose kid. You need to get to a hospital ASAP" said All Might as he picked me up out of this nightmarish crime scene and took me to a hospital.

Time skip

A week has passed, and the surgeons were able to successfully complete the operation to fix my bleeding face. They put stitches on the big scar and kept bandages all around my face except in my eyes and lower part of the mouth. I was paid a visit by All Might and he wanted to ask me if I was feeling better and questions about who committed the murderer in the dark alley. I told him that I was feeling much better and this is what I said to him about the murder:

"It was my brother Stain. He originally wanted me to do the honors of beheading the pro hero, but I decided not to cross that line and refused to do his bidding. So, he took matters into his own hands and beheaded the hero himself. I also wanted to quit working by his side and wasn't too happy about that and he cut my face and…"

*Sniff

I continued talking as I was bursting in tears "He told me that I was no longer his brother and to never return home. I don't know where to go from here. I lost my parents and now that monster is still out there hunting down other pro heroes to kill."

"What happened to your parents, young man?" All Might asked.

"They died two years ago in a fire while you were fighting that powerful villain," I answered.

All Might looked shocked as he recapped in his mind of the day that he fought a powerful villain known only by the pro heroes. 'All For One, I feel sorry for the young man, losing his parents during my big fight against the great evil.'

"Well, I love to stay and chat but duty calls. Get well soon, kid" All Might said as he starts to leave the door. However, I wanted to ask him a couple questions about my future goals.

"WAIT! Is it possible for a guy like me to become a hero? I know I was involved in terrible things with my brother by hurting 15 pro heroes to the point where they can no longer do hero work, but is it possible for a guy to turn over a new leaf and become an amazing hero just like you? I want to change and redeem myself for a better future. A-and also, where can I stay? I am all alone in this cruel world." I asked the number one hero.

All Might paused and took some time to think things through in his mind. 'The kid has a point, that he has nowhere to go. He would either be rotting in the streets or worse, getting killed by his evil brother. I have to do something. Think.' He paced around the room for a couple of seconds until he figured out an idea.

"I got it! But you must promise me a couple things," He exclaimed.

"Ok," I replied.

"Do you promise that you'll use your quirk only when allowed to in life and death situations?"

I nodded.

"Do you promise to not commit any murders or any types of theft from now on?"

I nodded.

"And do you promise that you'll redeem yourself from your past mistake and move on as a better human being?"

I nodded one more time yes.

"Then you too, can become a hero."

Present

It's been three years since All Might helped me move on with my life. He found me a good home in I-Island and lived with his friend David Shield along with David's daughter Melissa. At first, I didn't whether he was giving me a new home or punishing my crimes by exile. I assumed it was both, but I think All Might exiled me for two good reasons. One is for me to live a happy and peaceful life in the crime-free island, and the other reason is to keep me safe from my brother, because the both of us know that he will not be happy to see me again and most likely kill me.

Melissa and I got along so well that I loved her as a sister that I never had. It all started when she showed me around her lab filled with her amazing inventions. I asked her why she made all those inventions and she replied sadly that she was quirkless yet still wants to support heroes with her inventions. I cheered her up by saying that she can help me with her invention and teach me how to become a hero. Ever since that day, our bond grew stronger as a few years passed by and she was able to be accepted into I-Island Academy and she helped me ace the mock writing exam for U.A.

And that's where my story catches up to today. I came back to Japan, where I will start to take both the practical and the writing exams for me to apply to U.A and become a great hero like All Might. And this is where my story of how I overcame my villainous ways and become a hero, begins.

And that's the end of the origin. I hope you enjoyed reading this story. Next up, the entrance exams.

Leave a review and tell me what you think of the story, if I made any mistakes (not perfect in English Literature and writing) so I appreciate some word of advice.

Thanks for reading.