It has been a few hours since the arrival of the teachers and your sparring session with Mori, you were still a bit upset about Kalasha intervening but you had calmed down

You were now standing in the training fields in a Zenkai Zone with Midoriya, Issei, Ruby, and Akko as you had invited the four of them to train for the upcoming festival

Y/N: Alright, if you guys don't wanna be left in the dust, then we've gotta amp things up and train harder for the Sports Festival to hone your skills.

Issei: So what are you gonna do? Spar with us? Teach us something?

Y/N: All I can say is, once we're done today, You'll all be at least 500x stronger than when we started.

Akko: What?!

Midoriya: That much of a leap in just one day?! Are you sure about this?!

Y/N: Positive.

Ruby: W-Whatever you say...

Y/N: Now, let's get things started, I want all of you to come at me at the same time, and don't hold back, I want you to fight as if you're trying to kill me.

Ruby: But I can't imagine trying to kill you, or any of the others...

Akko: Same here...

Y/N: Well you're gonna have to...

Midoriya: Hold on a second Y/N—

Y/N: DODGE!

Your fist then met with Midoriya's face, the impact strong enough to knock him off balance as he stumbled back and gagged in pain

Issei: Holy Shit calm down, Man—

Y/N: DODGE!

You then forced your foot into Issei's stomach with a powerful kick, causing him to bend down and gag as well as he fell to his knees

Ruby: Y/N Listen—

Y/N: I said DODGE!!

You then hit Ruby with a heavy headbutt as she went flying back, causing Akko to gasp in surprise as you gritted your teeth

Akko: Y-Y/N! You've gotta be careful with her! She's a girl!

Y/N: I believe in gender equality, DODGE!!

You then went in to kick Akko on the side of the neck as she managed to dodge by ducking in fear, you watched as Akko covered her head and trembled

Y/N: You'll never be like chariot with an attitude like that! And you, Midoriya, you expect to become Number one when you can't even dodge a punch?! Ruby! I thought you said that you wanted to be a huntress, with reflexes like that you won't get far! And Issei! Get your ass up from the ground before I do it for you, and trust me you don't want me to come over there!

BOOST

As you continued to scream at everyone, Midoriya managed to regain his composure as you raised a brow, Midoriya's nose bleeding as you glared at him in disappointment

Y/N: Please! I could take a thousand blows like that before I start bleeding!! No wonder Bakugo thinks so lowly of you!!

Midoriya then gritted his teeth as he leaped towards you and cocked his arm back, shooting his fist forward as you tanked his punch without even budging

Midoriya then went wide eyed with fear as you then sighed and pointed towards your head

Y/N: Try my face.

Midoriya: What...?!

Y/N: I said try my face you little weakling!!

With that Midoriya then began to unleash a barrage of punches towards your face without thinking, each one connecting but not doing any damage

Midoriya kept this up for around 1-3 minutes straight as you didn't even move as much as a centimeter from where you stood

Now worn down and out of breath, Midoriya stopped punching you as he began to pant for air

Y/N: Really...?

All of a sudden you spin around and nailed him with a powerful kick to his chest, causing his eyes to widen as a massive sensation of pain rushed through his whole body

Blood then came spilling from his mouth as he went flying back, crashing into a boulder as you gritted your teeth

Y/N: Weak...even after all of that...you're nothing...

All of a sudden Issei appeared behind you with his balance breaker activated, you simply turned around with a look of disappointment on your face as he reeled his fist back

Issei: Eat This—

Issei was about to punch you when you suddenly smashed your fist through his Armor, shattering it completely as he too began to puke up blood

Issei: GAH......!!!!

Y/N: Get out of my sight!

With that you sent him flying off with a Ki blast as you then turned around to face Ruby and Akko, with Ruby still trying to recover from the first attack you landed on her

Akko: U-Uh...TAKE THIS!!

Akko, suddenly feeling the need to defend herself, waved her wand in front of you as a large beam of sparkly energy fired from the tip, the same bored and disappointed look remaining on your face as you simply tanked the blast, leaving behind a large smokescreen

Y/N: ...That it? I expected more to be honest...but oh well...

All of a sudden you bolted out from the smoke and appeared right in Akko's face with an orb of Ki in your hand

Y/N: Here hold this.

All of a sudden Akko was blasted by a large beam of yellow energy that sent her and Ruby flying away

You could then hear the sound of someone getting back up as you looked behind you to see Midoriya standing with us back hunched up, hardly able to stand

Eye-Catch

Eye-Catch

Midoriya: Darn it! He broke most of my ribs...and I think he punctured one of my lunges...!! I guess I have to go all out...

Y/N: What is he planning...?

As you thought to yourself, sparks of green and red lighting began to surge through Midoriya's body, with you sensing his energy rising exponentially, more than ever before

Y/N: So...What's this thing of yours?

All of a sudden Midoriya gained a large blue aura that looked quite familiar, standing up straight as he faced you

One For All: Full Cowling 100% + Kaioken 20x + God Ki

This massive increase in energy had the entire area shaking like an earthquake as even you were a bit surprised

Ruby: I-Is that...Deku...?!

Akko: He's Changed...!!

Issei: H-Holy shit...!!

Y/N: Hmph...About time! I can finally take you seriously—

All of a sudden Midoriya appeared in front of you mid-sentence, smashing his fist into your face as you went flying back

This shocked everyone as you soared through the air, eventually flipping yourself over and recovering as you smiled

Y/N: Now we're talking!!

You then dashed towards Midoriya who followed your act, the two of you flying towards each other as you flashed into Super Saiyan 5

Y/N: I'M GONNA CRUSH YOU!!

Midoriya then reeled his fist back and went in for a punch as you did the same thing, a massive burst of green and yellow energy erupting in the middle of the field as everyone struggled to stay put

Akko: Midoriya has all of us beat...!!

Issei: Look Closer...

With that they all looked closer to see that the energy was fading, revealing you and Midoriya standing in front of each other

Midoriya's Sparking fist was smashed into your face as you were hardly effected, where as your fist had dug into Midoriya's stomach, with a large mountain being completely destroyed behind him

Y/N: Good Job.

With that everyone went wide eyed to see that Midoriya went back to normal, falling over as you caught him with one arm

Midoriya: C-C-Can't......B-Breathe...

Y/N: I'm Impressed, All of you have definitely improved, if we were to fight before your Zenkai Zone training, all if you would be dead as we speak.

Ruby: You still did a number on us though...

Y/N: That was my whole plan.

All of a sudden you raised your hand as the Green Zenkai Zone began to turn white, everyone else shining white as well as their wounds began to heal

Issei: This Light...

Akko: So warm...

Eventually everyone was brought back to 100%, and everyone's wounds and stamina had been fully healed and restored

Issei: Whew! All better—UGH!!

Isssi suddenly felt a massive surge of power flowing through him, emitting a massive red aura as he began to power up

Ruby and Akko began to emit smaller base auras but they had become much more powerful than before

However, Midoriya was on a whole new level of power now

Midoriya: HAAAAAAAAA!!!

Midoriya couldn't even contain his new overflowing power, emitting a green aura twice the size of Issei's as you spoke up

Y/N: I amplified the effects of the Zenkai Zone temporarily, with this all of you can keep up with adversaries from my world now.

Akko = Multi-Planet Buster
Ruby = Multi-Planet Buster
Issei = Solar System Buster
Midoriya = Galaxy Buster
Y/N = +Multiverse Buster

Time Skip

Bakugo: WHAAAAT?!?!

Y/N: Yup, that's right, Midoriya can destroy a Galaxy at his best, while you stand at being at a building level.

Rias: H-How did you all even grow to be so Powerful in the amount of time that you were given...?!

Issei: The Good Ol' Double Z!

Y/N: I amplified the Zenkai Zone's effects, man the next time when we all train I'll do it again...

Lotte: Akko! You're so powerful now! How do you feel?!

Akko; I feel great! I'm definitely gonna be a great witch some day now!

Amanda: C'MON!! surely you can do it again today!!

Y/N: Sorry but I don't feel like beating the absolute hell out of everyone today, maybe when Kalasha pisses me off again.

Amanda: Man...

Jaune: So how's it feel to be a planet buster, Ruby?

Ruby: I feel proud! I've come so far thanks to Y/N!

Jaune: Yep! Whoever trains with him is destined for greatness!

Yang: Yeah!

Time Skip

You were now sitting with S/N as you had completely calmed yourself down, playing with your Son as Yang had decided to go on a girls night out, even though she along with a few others were simply outside

Y/N: Geez, that was some power Midoriya showed earlier...if he did that now...geez...he'd probably give Buu a run for his money...

S/N: Dada! Dada!

Y/N: Oh? Is my little warrior hungry? I'm hungry too, let's go grab a bite!

With that you picked up S/N in your arms and got up from the floor, walking off as you were then brought to a halt by Uraraka who seemed to look like she didn't know what to say

Uraraka: U-Uh...Y/N

Y/N: Hey, Uraraka, what's up?

Uraraka: So, while your were hanging out with S/N...someone managed to get into this reality somehow...we know him, he's in our school but how he got here we don't know...

Y/N: Okay? If he goes to U.A then he should be good, what's so bad about that?

Uraraka: W-Well...he's kinda...I dunno...He's our age, but he looked like an 11 year old...

Y/N: Okay? What's his name?

Uraraka: It's—

All of a sudden the doors slammed wide open as everyone then looked to see a boy wearing an outfit that consisted of the colours black and yellow, and his hair was a mixture of brown and blonde

???: Hello Ladies and Gentlemen, Guess who?

Uraraka: Kevin...

Y/N: ...Kevin...even for the witches' standards, that is the most normal name I have ever heard...like ever...actually...maybe not...

Uraraka: Well he's from another country from
What I know, but anyway, I'll try to keep him quiet since I know that it's S/N's Nap time soon...

Y/N: Okay, Thanks, now let's grab some snacks, my son!

With that you walked off, not knowing who had just arrived, in all honesty you didn't pay too much attention to anything other than your Son at the moment