Little Izuku woke up to being shaken. He opened his tired eyes to see.. himself?

  The greenette sat up, his eyes blown wide.

  "H-hello there.." the new Izuku said.

  "Hi.." Izuku responded.

  Inko chose that moment to open the door.

  "Izuku, it's time to-"

  All three of them froze, both Izukus staring at their mother with wide eyes.

  "Izuku..? I-is this your quirk?" She finally asked.

  Izuku in bed shrugged, while the Izuku standing by the bed nodded.

  "First Izuku was asleep when I woke up, I woke up standing up. I was made from a liquid coming from Izuku's hand.. I wonder if I can.."

  Second Izuku raised his right hand, letting a grey liquid pour into the floor, then rise up, forming another copy.

  "It worked!" The triplets said at the same time.

  New Izuku hummed to himself.

  "What if I try both hands?"

  He raised his hands, and twin streams of liquid fell to the ground, creating two new Izukus.

  "This is going to need testing.." all five mumbled at once.

  10 years later

  Izuku raced to the beach, excited to train his quirk some more. Bakugo had been extra aggressive today, telling him to jump off of a building like the inhuman freak he was.

  Izuku soon reached the beach, raising his right hand and creating a second him.

  As his memories, thoughts and intentions were all copied over, Izutwo knew exactly what they were doing.

  Izuku handed Izutwo half of his homework, and they had each finished within 15 minutes.

  They looked around at the spotless beach.

  Izuku and his clones had cleaned the beach thoughrily a few months ago, but so few people had started coming here.

  Izutwo melted away, evaporating into nothing by his own will.

  Izuku sighed, getting to his feet, leaving his bag leaning against the wall. He looked around, but found nobody else about.

  He raised both his hands, and formed two of himself as quickly as he could.

  "Five seconds to completion.. I can still get faster.." they muttered as one.

  Izuku spent the next couple of hours forming his doubles over and over again, each time the tiniest fraction faster than before.

  It took Izuku at least four and a half seconds to create a double of himself, the person he knew the best. His doubles could create eachother twice as fast as Izuku, as they themselves were doubles.

  Creating another person entirely? That took a lot of time, effort and concentration. Izuku needed other people's measurements, he needed to know them relatively well. The better he knew them, and the more detail he knew of the person, the faster and more refined the double would be.

  Izuku picked up his bag, slinging it over his shoulder and walking home with a sigh.

  Today's training had been excellent. He was exhausted from concentrating so hard for so long, but he was certain he could shave the time needed down to a second for the UA entrance exams.

  He was caught up in his thoughts, so he did not notice the sludge man oozing towards him beneath the bridge.

  "A medium sized skinsuit.. you'll do!"

  Izuku spun around, his eyes widening.

  He let liquid drip from his hands.

  Four...

  The villain sprang forwards.

  Three...

  The Villain's tendrils reached for him.

  Two...

  Izuku leaned back, unable to move if he wanted his quirk to keep working.

  One...

  The villain latched on to him, just as two Izukus sprang from seemingly knowhere, grabbing the original and tugging him out of the Villain's grasp.

  Izuku two and three already had their free hands raised, and another two Izukus leapt into the fray.

  Once Izuku One was out of danger, Two and Three raised their other hands and another pair of Izuku's appeared alongside the second pair's pair.

   There were now ten doubles between Izuku and the sludge villain.

  The newest double hid himself off to the side and began using his quirk.

  "What? So there are more of you? I'll just take you all!"

  It took Izuku's hidden double another ten seconds to finish what he was doing.

  A flash of blue and yellow blurred past the other doubles, throwing it's fist forwards and scattering the sludge with the wind pressure.

  "Fear not, for I am here!" The All Might double said.

  Each of the Izukus sighed in relief, all surrounding and congratulating the youngest on his brilliant idea.

  "Did you notice, you got it to 4 seconds this time!" The first double said to Izuku.

  "If I may ask young man.. how did I get here?" The hero clone asked.

  The original Izuku stuttered to explain as he watched the costumed hero scoop the scattered sludge into a pair of abandoned plastic bottles.

  "M-my quirk lets me clone people All Might sir.. you're the number One hero, so my double had the brilliant idea of creating a double of you from our memory.."

  All Might smiled at the young man.

  "Normally quirk use is strictly forbidden, however, as it was in self defence I'm sure that whichever hero comes along will forgive it."

  Izuku nodded to his idol.

  The hero duplicate regarded him carefully.

  "Do you want to be a hero when you grow up young man?"

Izuku smiled, nodding much more vigorously this time.

  "More than anything else!"

  The hero laughed, his signature smile growing wider.

  "Well, both your quirk and your strategic thinking are well suited to the job! I'm sure you'll be an incredibly popular hero!"

  Izuku smiled bashfully, looking at the floor.

  "I don't want to be super popular.. I just want to be able to help people, as many as I can, however I can."

  There was a clatter from deeper within the tunnel, and a hulking figure stepped into the light.

  "I am here!.. again..?"

  The newly arrived All Might stared in confusion at the group of one boy talking to his younger, costumed self.

  The younger All Might stepped forwards, handing the sludge bottles to the original, his future self.

  "So, I'm still alive, even at this ripe old age? I must have done a good job."

  The hero turned back to Izuku.

  "The real me is here now young man, you can let the rest of us go. Be sure to explain your quirk to him also."

  The hero paused, turning to his uncostumed self.

  "The boy wishes to be a hero, just to be able to help. He cares not for fame, or glory. I would give it to him if I could.. but I'm not All Might." He uttered quietly, a smaller smile gracing his features.

  All Might regarded Izuku with interest, nodding to his double.

  "I shall keep your advice in mind." He said, just as young All Might melted away alongside the rest of Izuku's doubles.

  10 minutes later

 
  The more All Might heard from the boy, the better he understood his double's advice.

  He would definitely keep his eye on the boy. A selfless mindset, a determination to succeed, and the strength to pull through.

  "I'm afraid I must be going young Midoriya. However, I hope we meet again!" The hero said, leaping from the ground.

  Izuku watched his idol fly over the buildings in awe.