Full Summary: Midoriya Izuku and Shigaraki Tomura are, at first glance, two completely unrelated children. One was as kind as an angel, while the other was as vindictive as a demon. One adored heroes from the bottom of his heart and the other despised them more than words can describe. One was destined to be the greatest hero of his generation, while the other was destined to be the greatest villain. Unbeknownst to them though, they are connected by blood, both of the children possessing a relation to the deceased hero Shimura Nana. As a result of this connection, both possess a quirk that allows them to destroy anything with a touch, leaving nothing but dust behind. These two do not know it yet, but their fates are soon destined to clash...

IMPORTANT AUTHOR NOTES:

Izuku will get One for All in this story. As the story goes on, the reason for this will be quite clear, so please bear with me if you dislike that. This story was started before the release of the chapter that revealed (SPOILERS FOR ANIME ONLIES) that One for All has more aspects to it than super strength and vestiges, so that plot point is ignored in this fic. The vestiges are also far more prominent here, playing far more of a role in the story overall.

I also believe it is necessary to mention that Midoriya Izuku is Bi in this fic. His primary ship IS with Uraraka, but there is ship-teasing with other characters. Nothing much beyond teasing though. If that bothers you, that's fine.

As Midoriya Hisashi basically doesn't exist in canon, I took creative liberties and made him into an actual character. He is a major addition to the cast here, but as he is basically an OC due to a lack of canon information on him, I thought that should be important to mention. There is a grand total of one other OC that will play a prominent role, as an antagonist, later down the line. Minor OCs that are irrelevant to the major plot are occasionally used at some points for the purposes of world-building and elaborating on characters. If this bothers you, that's fine.

"Don't turn around Inko."

"What?"

Hisashi squeezed her tighter.

"I said don't turn around."

12-year-old Inko forced her way out of Hisashi's grip and turned towards the TV.

"What are you talking about Hisa-"

Inko froze. On the screen was a news report on a recently deceased hero. This, unfortunately, wasn't out of the ordinary in hero society, but that wasn't what caught her attention. What caught her attention was the name of the deceased hero.

Her mother was dead.

Hisashi cursed and turned off the television in front of them, before grabbing her and pulling her into a hug

The kind woman who cared for everyone, and whom she had only met a few times, was dead.

She distantly heard Hisashi calling her name, but she just ignored him.

Her mother was dead. Inko's mind repeated this, but she still couldn't process it.

Tears poured down Inko's eyes.

Her mother was dead.

"Inko."

"Inko!"

"Inko!"

30-year-old Inko awoke to tears in her eyes and her husband shaking her. She drowsily sat up on the couch and noticed the clock. It was just past midnight, meaning she'd only been asleep for 2 hours.

She shifted her eyes to her husband and fully processed that he was there. Immediately, she latched onto his larger frame and hugged him with all of her might.

"I see that you're happy to see me."

Hisashi forced out with a grunt of pain.

Inko immediately let go of him.

"Sorry, it's just been so long since I last saw you."

Hisashi's expression slowly morphed into a shit-eating grin.

"You know it's fine to be rough with me, let's just make sure Izuku is asleep before we get started. I can get the whip if you want?"

Inko slapped him upside the head, blushing furiously.

"You incorrigible horndog!".

Hisashi let out a hiss and gave her a slight glare.

"You damn Harpy, you almost ripped off my scalp."

Inko, still blushing furiously, replied back with a scream.

"I'LL SHOW YOU A HARPY!"

Inko pushed Hisashi onto the couch before playfully beating on his chest with her fists.

Hisashi laughed and responded in an overdramatic voice, "I give in, you're just my harpy."

Inko beat his chest one more time playfully, before she laid down next to him on the couch. She snuggled up against him and laid her head on his chest, still blushing a moderate amount.

"I'm so happy you're home."

Hisashi lowered his hand and stroked her head.

"So am I. Besides, do you think I would just skip out on my only child's 4th birthday?"

"You missed his 3rd one."

Hisashi winced.

"Oh come on, you and I both know that my flight got delayed due to that villain attack at the airport."

Inko gave him an annoyed look before laying her head back on his chest.

They sat in silence for a few minutes before Hisashi broke the tension with a question.

"Do you want to talk about it?"

"I don't know."

"Was it the one where you watched her die again?"

Inko looked up in surprise towards Hisashi, who now had a half-hearted smile plastered on his face.

"You always cry when you have that dream."

Inko looked down with a small tremble.

"You know me too well."

Hisashi stroked her hair for a minute.

"I never really understood why you cared so much about someone who abandoned you and separated you from your brother."

Inko considered his words before responding.

"I've pondered it myself multiple times, and I guess the best answer I can give is that she was my mother, no matter what she did to us."

Inko clenched his leg fearfully.

"Besides, no one deserves to die to that…..thing."

Hisashi looked thoughtful for a moment.

"Have you started training Izuku yet?"

Inko shook her head.

"No, he's way too young for that. I plan on starting when he's about 7. He needs to be fit enough to defend himself if that monster ever figures out who he is."

Hisashi let out a sigh before leaning back.

"You should go to sleep, we have to get up bright and early to check if our little Izuku got his quirk yet."

Inko let out a yawn of acknowledgment before drifting off on her Husband's lap.

Izuku woke up to find his hands had gone clean through his bed.

That was odd.

The little four-year-old pushed his hands against the ground, trying to push himself up. The instant he did however, his hands went straight through the floor.

Izuku panicked and started screaming.

Almost inhumanly quickly his mother and father(When did daddy get home?) smashed open his bedroom door in battle-ready stances. They looked around quickly for an intruder before seeing the predicament their son was in.

Inko, being the one closer to Izuku, pulled her son off the bed, while Hisashi continued scanning the room for anything out of the ordinary. They both looked extremely tense, eyes darting around the room near constantly.

As Izuku sat in his mother's grip, he let his body relax and leaned into her. He reached up with his left hand and tightly squeezed his mother's hand with his own.

He stopped squeezing when his mother screamed out in pain and let go of him.

He whipped around to see what was wrong and froze at the graphic sight before him. The top layer of skin on his mother's hand was completely gone, exposing the muscle beneath. Blood seeped from the wound and immense pain was etched on her face.

His father quickly grabbed his mother's arm and examined the skinless patch on her hand. His worried face slowly morphed into one of understanding before turning his head towards Izuku.

Izuku was in the process of lowering his hands down to his sides when his father suddenly grabbed his arms and pulled them as far away from his body as possible.

"Izuku," His father began in a quiet voice. "I'm going to need you to make sure that you don't lower your hands fully until I tell you to."

Izuku was trembling, tears coming from his eyes.

"Daddy, I'm scared."

Hisashi gave him a reassuring smile that looked all too shaky.

"There's nothing to be afraid of, I'm just going to get some bandages for your mother. Then I'll make you some gloves, and we'll head to see a nice doctor who can help us."

Before Izuku could process his words, his father had dashed out of the room towards the bathroom.

The young child turned his head towards his still crying mother. He didn't fully understand what was going on, but he understood one thing.

He had done this.

He had hurt mommy.

Only villains hurt innocent people. That's what Kacchan always said. Did that make him a villain?

Deku's eyes teared up.

He wasn't a villain. He hadn't meant to hurt mommy. He didn't want to hurt anyone.

He wasn't a villain.

He wasn't a villain.

He wasn't a villain.

Deku was still crying when his father came back with several bandages and a pair of black gloves with the ring and pointer fingers missing.

Hisashi sat next to his son in 's office. He had no idea how his day had hit the fan so quickly. One minute he was cuddling with Inko for the first time in months, the next he was wrapping his wife's hands in bandages from the damage caused by his son's quirk.

Hisashi winced at the last thought.

Speaking of his son's quirk, it turns out he had inherited Inko's father's quirk. He didn't know much about the guy, but Inko had informed him of her parent's quirks once before when they were discussing Izuku's possible quirk. She had offhandedly mentioned that he always wore gloves with a few fingers cut out to avoid disintegrating things. Thank god he remembered that little quip.

Inko was currently getting treated in another room, so he had decided to sit with his precious child while Izuku was getting tested. The poor thing was bawling his eyes out with a look that made Hisashi want to cuddle him. That unfortunately needed to wait until after the doctor confirmed it was safe.

"Your son has quite the interesting quirk if I do say so myself."

Dr. Tsubasa's tone was utterly uncaring.

"From what I understand, his quirk destroys anything his 5 fingers touch, making it crumble to dust. From what we gathered, it does not matter if the target is organic or not, with the speed of decay varying with how hard he grips the object. It also seems to consistently spread from the target area when he grips hard enough, with the decay spreading throughout the area until the object is completely decayed. The effects do not seem to be voluntary, but they do not affect his own body. Quite frankly, your wife is lucky that she'll be walking away with only a bit of scarring."

Izuku cried harder at those words.

Hisashi reached out to cradle his son while glaring at the completely impassive doctor.

Dammit, why would he say that in front of him? Did this asshole want to traumatize his son, or was he just an idiot?

They continued their glaring match as Hisashi tried to wrap his arms around Izuku. His precious son pulled his head away from Hisashi's grasp and scooted away from him.

"My fault, it's all my fault."

Hisashi sighed and tried to comfort his son.

"Izuku…."

The boy did not hear him, still curled in on himself.

"My fault…."

Hisashi's heart hurt at his child's murmurs of distress, but he did his best to not let it show.

"Nothing's wrong my little hero. Mommy is fine, and it was just an accident. Nobody blames you for anything."

Izuku appeared to have not heard him and continued mumbling to himself.

"It's all my fault."

Izuku was watching his favorite All Might moment on repeat when Inko walked into the room. Hisashi had left to get groceries, insisting that she needed to rest and look after him.

Silence filled the room.

Izuku suddenly turned around, tears in his eyes.

"Can I still be a hero mommy, even with my quirk?"

His voice was so small and pathetic that Inko almost responded yes. She almost assured him that he was fine the way he was and that he didn't need to worry one bit. She nearly told him that he could be a hero, just like her own mother.

The camera zoomed in on the body. She saw everything. The lifeless eyes that stared back at her, the blood-covered black costume, the still-smiling face that was her mother's trademark.

The screen read 'Pro Hero Shimura Found Dead'.

She can't let that happen to him too.

She wrapped her arms around him and cried with him, sobbing into his arms, able to only repeat one phrase over and over again.

"I'm sorry Izuku!"

Screams of terror rang out as he watched his parents turn to dust in his hands.

Kacchan's smile crumbled to nothing, as he held his hand.

All Might raised his fist, preparing to punch him.

Izuku woke up terrified, gripping the sheets with his still glove-clad hands.

He gripped his throbbing head.

"I'm so sorry. I'm so sorry. I'm so sorry"

Katsuki was wondering what was wrong with the shitty Deku. He'd been quiet and dead-eyed all morning, avoided touching people the whole day, had refused to do their super-secret handshake, and had gotten all tense and scared looking when he had slapped him on the back. Not to mention the weird gloves he was wearing. Seriously, why who would design gloves with only three fingers? It looked stupid.

At recess, he cornered him with his group of extras.

"What's wrong Deku? Why have you been avoiding me all morning?"

The shitty Deku looked around nervously, trying to find a way out of the situation. When he found none he relented and bowed his head.

"You know how yesterday was my 4th birthday?"

Katsuki had honestly forgotten. After all, why would he need to keep track of the shitty Deku's birthday?

Before he could respond, Deku continued.

"Well, I kind of got my quirk yesterday."

Katsuki got excited. He could finally know what his future sidekick's quirk was. This was awesome.

"Well spit it out, what is it?"

Izuku's eyes teared up, distress evident on his face.

"It's terrible Kacchan. It's evil and I hurt my mom when I first used it. It's so destructive and villainous. I can't save anyone with it. Without these gloves, I might've hurt someone just by walking aroun-"

Katsuki got bored of his speech and grabbed his future sidekick's gloves, quickly tearing them off to the shitty Deku's surprise. He brought them closer to his face and examined them with disinterest.

"You mean these gloves? What's so special about them?"

Deku desperately grabbed forward for them, feeling exposed and vulnerable. Katsuki, in surprise at the sudden movement, held up his left arm for Deku to grab. The shitty Deku's bare fingers met the smooth skin of his arms.

It was an accident, a pure twist of fate, but neither would ever see it that way.

Katsuki felt nothing for one moment, feeling as if he had made a mistake of some kind, before a burning sensation traveled up his arm. The young boy screamed and let go of the gloves, looking at the cracked and partial decayed skin of his left arm. The pain was unlike anything he had ever felt before and it got more intense by the second.

Deku swiped up the gloves and quickly put him on. He turned to Katsuki and reached out to help him. That same concerned look was on his face, taunting Katsuki with it's pitying kindness. He looked so worried about his wellbeing.

Katsuki was suddenly aware of all the eyes staring at them, all the eyes that got to see just how vulnerable he was. They peered into him, that same damn pity all but radiating in waves towards him. Concern was likely on their faces as well.

Everyone was looking down on him.

Katsuki screeched, knocking the smaller boy to the ground with a powerful kick unintentionally aimed at the solar plexus.

"Get away from me you stupid villain!"

Katsuki stood up and brushed himself off, desperately trying to save face right after facing such humiliation. He did his best to ignore the growing pain in his left arm and looked up at the trembling Deku in front of him.

"If you ever come near me again, I'll kill you."

With unnatural haughtiness for a four-year-old, Katsuki turned to face a teacher and walked alongside him with a sneer to the nurse's office.

He never saw the hurt, tearful look Deku shot at his back as he strolled away.

Katsuki didn't talk to Izuku anymore after that.

Neither did anyone else for that matter.

Nine-year-old Shigaraki was playing one of his favorite games, a remaster of the two-hundred-year-old Bioshock, when Kurogiri poked his head into his room.

"Young master, it's time to go to bed."

Shigaraki half-heartedly grumbled about the unfairness of his curfew before saving his progress and turning off his console.

He got up and started heading towards his bed when Kurogiri grabbed him by the shoulder. He glanced up in confusion at his caretaker's gesture

"I'm sorry, I forgot to mention that Sensei wished to talk to you first."

Shigaraki's eyes widened and he dashed out of the room towards the TV in the bar. He quickly sat down in front of it and turned to look expectantly at his guardian. Kurogiri walked over, and with a sigh, turned it on. The familiar words of 'Audio Only' on the screen.

"Shigaraki my dear child, how are you doing?"

The young child, being far too naive to the world around him, didn't notice the lack of emotion in the question or the subtle flinch of his caretaker at the sound of the voice.

"I'm doing great Sensei! I just beat that game you recommended to me. It was pretty garbage though. How are you doing?"

Sensei let out a blatantly mirthless laugh before replying.

"It's a pity you did not enjoy it, but I'm doing just fine my dear child."

Shigaraki's eyes sparkled as if they were stars at his Sensei's words. The excitement and adoration on his face were almost adorable, causing a small smile to form under the fog of his guardian's face.

"That's great Sensei! Do you know if or when I'll get to see you next? I miss you so much!"

Sensei paused for a moment in silence before continuing.

"No my child, I'm currently dealing with the problem of All Might-"

All Might would come and rescue him just like sis said.

He had to, because All Might saved everyone, regardless of if they were a hero or villain.

He had to…

The adults kept passing by, telling him the heroes would come eventually, before just walking away. He knew that the heroes would come as long as he stays put, just like his sis always said…

Eventually…

…...

Why had nobody come to rescue him yet?

Why was he all alone?

Why were mommy and sis gone?

Was he that pathetic?

Did he matter that little?

He was so hungry….

He was so thirsty….

He was so alone….

…..where were those footsteps coming from?

"-and once that's over with, perhaps I'll come for a little visit."

Shigaraki zoned back in and realized that he had missed the response to his question.

"Can you repeat that again Sensei?"

Kurogiri noticeably flinched, but Sensei let out another mirthless laugh that echoed throughout the bar.

"I'm sorry if my response bored you, my child. To keep it brief, I'll visit after All Might is dealt with."

All Might. The name he hated more than anything. The man who promised to help others, no matter the circumstance, but never came to help him. He wanted to hurt him like he had been hurt, decay him until there was nothing left, tear his flesh apart, and scream about how he had never come to help him. But he was still too weak. He needed to get stronger.

A crackle of static came from the television.

"I apologize, but I must cut this call short. I hope we can speak again soon. Go to bed my young ward, and dream about a better tomorrow without All Might."

Kurogiri turned off the TV and turned to face the disappointed boy. With a gentleness that was quite unnatural for the career villain, the fog villain lifted up his young ward and carried him to his bedroom. The criminal gently laid him on the bed, pulled the covers to his ward's neck, and turned off the lamp next to his bed.

With a small kiss on the forehead goodnight, Kurogiri left the room to resume his duties.

Shigaraki went to sleep that night thinking of all the pain that he would cause All Might, and how proud Sensei would be when he achieved his goal.