Monday afternoon 

Izuku had met All Might at the beach and was pulling a fridge with one arm with All Might sitting on it. "You're a lot stronger than you look." All Might said.

"Extremis. It's a bio forming virus that treats the body like a machine and overclocked its natural processes." Izuku said, demonstrating by heating up his hand and punching the fridge. "It's no quirk but it does its job."

All Might had a look that Izuku could read "And yes it could fix your lungs." Izuku said.

All Might said "You're telling me you have all that and it isn't a quirk? When is something considered a quirk?!"

"A quirk is powered by subatomic vibrations. Every quirk has the ability to fuck reality up the ass if you get a good enough with it. The Yaoyorozu family can manufacture rare elements or even elements that don't exist!"

Meanwhile

Momo Yaoyorozu and her parents sneezed. 

"An anti gravity quirk could turn a black hole into a sun."

Meanwhile 

Uraraka Ochako sneezed and got sent flying into the wall of her bedroom.

"You think the human body can produce enough nitroglycerin to fill an Olympic swimming pool without dehydrating?"

Meanwhile 

Katsumi sneezed.

"And don't even get me started on you or Endeavor!" Izuku said "Frostmaid is cold enough to create an atomic bomb if she tried. You have a nuclear plant's worth of energy in your cells! Endeavor creates flames that can't be extinguished by conventional methods."

Meanwhile 

Rei Todoroki sneezed and a nurse asked if she was ok.

Elsewhere 

Endeavor sneezed his morning paper to ashes. "RICKY!"

"He's on vacation Endeavor sir." A person on the intercom said.

"Oh right. How many vacation days does he have again?" Endeavor asked.

"He has about 6 months saved. He's in the tropics for the next two weeks."

"Oh right. Call him and tell him I want a shot glass."

"Right away sir."

Back at the beach

"Quirks aren't mutation, they aren't something biological, they're metaphysical. They're forces of nature. Sure genetics play a role in which one you have but the quirk itself is…"

"The power of a God." All Might said. Imagines of his master and the one who passed the quirk down to him. The number one hero had gone through his teenage years feeling completely useless and the world reinforced that notion.

"Mommy I wanna go home." A little Toshinori with a bloody nose and a broken toy, melted into slag. "I miss America. I miss dad."

His mother could only hug her child.

All Might had tried so hard to get Nana's autograph and he got jumped before he could get to the signing.

The breaking point was his girlfriend in bed with another guy and laughing in his face at how he thought he'd ever be anything but a failure. Toshinori was sitting on a bridge, nearly 18 years old, a case of beer he snagged from his mother's fridge, he had planned to jump.

Then his hero saved him.

The number one hero had talked to him that whole night. Toshinori had bled his heart that night. His life, his pain and Nana didn't give him pity or shit for it. She gave him a choice. Jump or something special from her. He chose the second.

All Might watched as a 5'8 shrimp picked up a washer and ripped it open. "Hey Kid. That armor of yours. How strong is it?"

"Wanna test it out?" Izuku asked, grinning.

All Might watched as Izuku pulled out his phone and pressed a button.

The suit was in front of them in a few minutes. "You up for a few rounds?" Izuku asked.

All Might decided to give the boy a fighting chance and stay in his thin form. He could start Midoriya's exercise plan after he actually had an idea how strong he was.

That was his first mistake in that fight.

Izuku had floated and burst forward grabbing the arm All Might was gonna block the strike and swing around forcing Toshinori's body to spin and got rocket slammed into a pile of junk.

All Might took a shallow deep breath and transformed.

Izuku had thrown everything he could at the number one hero. With his pointer finger charged with his quirk All Might blocked the strikes but Izuku followed with a chained kick or punch.

All Might had caught his leg and Izuku launched himself over All Might's head with his repulsors. A burst from the chest piece has cracked All Mights arms. "Oh I've had a crick in my shoulder for a few days." All Might said moving his arms.

Izuku growled and advanced.

All Might caught his arm with ease. "You've got form but you still lack strength."

Izuku's eye slits turned red and a massive charge from his chest repulsor blasted All Might back.

The number one hero brushed off his clothes. All Might laced his fingers and with a single crack a pulse of force staggered Izuku.

Izuku opened his shoulder piece and a barrage of missiles flew towards All Might. The hero's eyes opened as he could grab 3 out the air but got hit by the other 17. Not a scratch.

All Might reeled back a punch and shouted "Detroit SSSMMMAAASSHH!"

Izuku grabbed a fridge and chucked it at All Might and rushed forward using the kitchen appliances as a bullet monkey. The force of the punch sent Izuku flipping forward but he followed with an Axe kick to All Might forearms blocking the hit.

All Might grabbed Izuku's ankle and threw him into the ocean. A loud bang had been what All Might heard before another metal fist met his face. Just a fist.

A gloveless Izuku had punched him in the back of the head and supplex All Might into the ground. 'Why does this feel familiar?' All Might thought as his head was partly in the sand.

A scissor headlock and a little torque had Izuku pinned. "Impressive Young Midoriya but it will take-"

Izuku's mask opened and he spit in Toshinori's eye. When Izuku was free he grabbed a handful of sand and got it into All Might's face. 'This is why my eyes are narrowed when I fight. Gran Torino taught you this year one.' All Might thought as he was focused on getting the sand out his eyes.

Izuku ran through everything he could remember from his time with Tony. 'Roady! It might work.'

Izuku charged his repulsors and then focused the charge back to the main reactor a small stream of beams connected in middle of his chest before a miniature ball of plasma was formed in front of Izuku chest and fired with the main reactor right at All Mights face resulting in a crater of glass surrounding a deflated All Might with a burned shirt.

Izuku rushed forward and just started swinging. Toshinori was reacting to each attack.

When the two got locked fist to palm the two fought sinking into the ground.

All Might coughed up blood and Izuku's reactor started to smoke and power down. 'SHIT!' Both thought as they had been completely drained.

Izuku was on his knees. All Might had a hand on his head in what All Might meant as a comforting gesture but Izuku was having Thanos flashbacks.

"You definitely have my respect, Midoriya. I can see you being a hero in the future."

"I can beat you without a quirk." Izuku said, breathing heavily "I don't want it until I can."

"A valid option. But you know how powerful my quirk is." Toshinori said, wiping the blood off his own mouth. 'That was the closest thing I've had to an even fight in the last few months. Izuku actually gave me a chance to actually take stock of my quirk.'

"Rematch." Izuku said. His armor power cell charged the main reactor to a passive function level. "Give me...a week."

Toshinori chuckled and said "How about we do this again next Sunday."

Izuku nodded.