This chapter takes place before the Kamino Arc, Izuku doesn't have his quirk yet. At this point, Izuku has interacted with Toshinori, but not All Might. The teachers decided not to tell Izuku that Toshi is All Might, since Izuku doesn't really keep secrets. He's a trusting child.

I have two different headcanons for All Might - DadMight, and that he's really terrible with children. I debated between the two, but I figured that Izuku has enough parents XD.

In other words, this chapter is why Aizawa doesn't let All Might baby-sit anymore...

"I AM HERE!"

All Might burst into the classroom, sporting his usual grin.

"You're late." Aizawa deadpanned.

"Uh…" All Might paused.

"I have a meeting with Endeavor," Aizawa scowled. "About Todoroki's training. I'm not going to expose my son to that burning trash heap more than I need to, so if you don't mind watching him for the period, I'd appreciate it."

"Of course!" All Might grinned at Izuku, who was staring, awed, from behind Aizawa's leg. "I'll take good care of young Aizawa. Do not worry, old friend!"

Aizawa nodded, then moved toward the door. He stopped. Izuku clung to his leg.

"Hey, bean sprout," Aizawa knelt down. "Do you need something?"

"Um…" Izuku mumbled shyly. "Where are you going?"

"Otou-san has a meeting, bean." Aizawa said gently. "I'll be back before you know it, okay?"

Izuku glanced up at All Might.

"Are you nervous, bean?" Aizawa asked. Izuku nodded. "Don't worry, All Might is really nice."

Izuku nodded, but he didn't let go.

Aizawa gently grabbed Izuku's hands. "Hey, you know the students will keep you safe, and Yaoyorozu and Iida can call me if you need something, okay?"

"Okay," Izuku answered quietly. Izawa let go of his hands and, after a final wave, Aizawa vanished.

Izuku immediately welled-up with tears.

"Oh no," All Might said.

Aoyama, who sat right next to the door, immediately stood and picked up Izuku. "Shh, mon chéri," he hummed. "We've got you."

The class murmured its agreement.

All Might was suddenly aware that he was way out of his depth. But he had a class to teach. "Alright everyone! Put on your hero costumes and meet me on Ground Beta!"

*on Ground Beta*

"Alright!" All Might began. "Is everyone here?"

"Where's Deku?" Bakugou growled.

"Ah, young Bakugou! Young Aizawa agreed to help me with this exercise. Today, we are doing Hostage Drills!" All Might held out a hat. "Use this to get into groups of 3, then you will take turns working together to safely extract a hostage from a delicate situation."

"All Might." Yaomomo spoke up, tone serious. "Where is Izuku?"

"Young Aizawa is waiting for me at the 'crime scene'! It is too dangerous to jump around with a small child." All Might grinned, proud of his "responsible" babysitting skills.

The class looked horrified. Bakugou lunged forward. "You can't leave a three-year-old by themselves!"

Now, All Might has faced many terrifying villains in his day. He didn't get #1 for nothing. However, in the face of these young heroes-in-training, he couldn't help the shiver that went up his spine.

Iida dropped the hat unceremoniously. "He will have wandered off by now." Iida said. "So this is now a Search-And-Rescue.

"And All Might," He turned to face the teacher. "You are a suspected kidnapper. Better run."

The class had barely covered rescue training, but in that moment, everyone vividly remembered the procedures. They efficiently split up into pairs and ran off in separate directions.

Bakugou grabbed Todoroki and stormed off after All Might.

"I would have expected you to bring Kirishima with you, Bakugou." Todoroki said.

"Shitty Hair and the rest can find Izuku." Bakugou growled, not noticing his use of Izuku's real name. "So I'm going after All Might. But," he glared at Todoroki. "He's strong. So I'm bringing you for back-up."

"I see." Todoroki nodded. "All Might will have headed for the crime scene, to try to fix his mistake."

"I know that, Half-and-Half."

"You'd be able to see it from the air," Todoroki suggested.

Bakugou paused. "Fine. Keep up if you can, Candy Cane."

Bakugou launched himself in the air with his explosions. Todoroki followed closely behind with his fire and his ice.

"You aren't holding back, hah?!" Bakugou yelled.

"I will use my fire for Izuku." Todoroki responded.

They flew for a bit until Bakugou caught sight of bright yellow crime-scene tape. "THERE!"

Jirou jerked her head up. "Over there." she said, voice hushed. "I think it's Izuku."

Uraraka, using her quirk to reduce her gravity, sped away in the direction Jirou indicated. "Izu-kun, are you in there?"

"Ura-san!" Izuku yelled, running over to her. Uraraka knelt down and welcomed him back with open arms. Izuku grabbed her astronaut-themed uniform and sobbed into her chest. "I got lost! I got lost and I couldn't find you or Momo or Todo or Kacchan-"

"Aww, Izu-kun, it's okay!" Uraraka scooped him up. "We found you, so it's all okay!"

"Ura-san, why did All M-Might leave me alone?" Izuku looked up at her. "Did he have to go fight s-some villains?"

"How about we go find your otou-san?" Uraraka suggested. Jirou caught up to Uraraka, panting slightly.

"There's some explosions on the South side," she said. "It's a safe bet that Bakugou found him."

Uraraka nodded. "Out the North gate, then. Good, that's closest to the main building."

The girls may have burst into the meeting with some words to share, and Aizawa may have been irritated by the interruption of the meeting he'd been trying to get for ages, but that was nothing compared to the anger he felt toward All Might.

As soon as Todoroki and Bakugou saw Aizawa, they backed off from their fight against All Might.

"Giving up, boys?" All Might straightened.

"They know when they are in the way." Aizawa growled. All Might stiffened at Aizawa's icy tone.

"Ah! Aizawa!" All Might turned, giving his best smile. "Is the meeting done already?"

"No."

"Oh," All Might frowned. "Then why are you here?"

"Because I made the mistake of assuming that the Number One hero would be able to keep an eye on a small child and not leave them alone in a strange environment." Aizawa glanced at the two students. "Go back to the classroom. Bring the others."

They left.

Aizawa activated his quirk and prowled forward.

"Aizawa," All Might shrunk to his skeletal form. "I swear, I didn't mean to leave him alone, it's just, it's too dangerous to travel through the air with a small child-"

"Then walk." Aizawa flicked his capture weapon, wrapping it around the skeleton. "How did the Number One hero come this far without learning how to handle young children?"

"...It never came up?" Toshinori gave a weak grin. "I'll learn."

"Until then," Aizawa removed his weapon and deactivated his quirk. "You won't be left alone with my son."

Aizawa swept away. Toshinori pulled out his phone and began looking for child-care lessons. Young Izuku was just too cute to not want to babysit.

...This chapter did not turn out at a good quality….

We'll see All Might again eventually, when he knows better. Until then, hopefully Izuku gets over his shyness. He has a million questions…

Requests? I'm open to suggestions. I want to do something with Eri and Koda and Izuku soon, so ideas for that playdate would be great!

Appreciate you all! ~BlackPolaris