No one's POV:
The next day:
We see adult izuku in one of the school gyms hitting a punching bag while he remembers a lot of the events that happened on his timeline the war,All for one,Gran torino,the death of both his mother and All might and Shigaraki without realizing it he punched the bag so hard it was sent flying
A.Izuku*breathes heavily*I think i went a little bit overboard
???:You think?
He turns around and sees his other self looking at him impressed
Izuku:How much percentage did you use for that punch?
A.izuku:I wasn't using one for all
Izuku:Oh,anyway why did you tell me to come here?
A.Izuku:Simple you and me we are going to spar
Izuku:What?
A.Izuku:I mean not in here of course we don't to destroy this place now do we
Timeskip:
In the 1-A dorms almost everyone is already awake and eating breakfast but one of the kids notices the absence of both izukus
Emma:Where's dad?
Ryu:Which one?
Emma:The two of them
Itsuka:I don't know they are probably training
Boom
Itsuka:Yep i was right
They look to the forest and see a cloud of dust and green blurs moving around
Emma:I want to see them training can we go mom can we can we-ow ow ow stop pulling my ear!!
Mikasa:Sit down and finish your breakfast then*glares at her*
Emma*gulps*O-ok
Itsuka*whispers to yui*Your daughter is terrifying
Yui*proud mother noises*
A.Eri:Good morning everyone
All:Good morning
A.Eri:Where's da-
Boom
A.Eri:Nevermind
Meanwhile with both izukus they are now standing in front of eachother with one for all activated
Izuku:That punch hurt
A.Izuku:It was only 2% don't be a baby
Izuku:If that was 2% i don't want to imagine 100%
A.Izuku:Do you think i could destroy a mountain?
Izuku:Maybe but please don't try it
A.Izuku*chuckles*You ready?
Izuku:Yeah...just give me a minu-
He couldn't finish because he was sent flying by a punch and crashes into a tree
Izuku:Ouch why did you do that for?
A.Izuku:Always expect the unexpected villains aren't going to give you a chance in a fight you have to be ready for anything
Izuku:Ow
A.Izuku:Come on attack me
Izuku throws a rock at him thanks to blackwhip the other izuku dodges it but gets surprised with a kick to the face
Izuku:You didn't see that one coming
A.Izuku:Nope i didn't
He gets up and looks at izuku but he doesn't see izuku what he sees is shigaraki standong in front of him with a hole in his chest and the bodies of his mother and master on the floor he sees shigaraki laughing he looks in anger and hits him sending him far away,he starts walking towards him but a voice stops him
A.Eri:Dad stop!!
He snaps out of it and sees izuku on a rock bleeding a little bit while the harem helps him
A.Izuku:I-im sorry*leaves*
A.Eri:Dad!!*goes after him*
She catches up to him and sees him in a bench looking at the sky
A.Eri:Dad?
He doesn't say anything so she decides to sit down beside him he looks at her
A.Eri:I thought you stopped having those
A.Izuku:I don't know what happened i saw him standing there and mom and all might dead i just couldn't
A.Eri:Hey it's ok you can get through this just like you did before
A.Izuku:I don't think i can do this eri if i see him i might loose control again
Eri just hugs him and he hugs back they stay like that for a couple minutes and then they get up and leave to visit izuku
Timeskip:
Rg:And done you're back to normal
Izuku:Thanks recovery girl
Rg:Yeah yeah this is basically your second home
Momo*chuckles*That's true
Mirko:Grr im going to kick him for what he did to you
Izuku:You know he's me right
Mirko:Yeah so what
Izuku:Wow i thought you loved me
Mirko:I do love you!!
Izuku:Then why do you want to kick me?
Mirko:I want to kick the other you not you you
Izuku:We're still the same person!!
Ryukyu:Alright alright stop it you two
Toga*blinks*What just happened?
Nejire:I have no idea
Knock knock knock
A.Eri:Can we come in?
Rg:Sure
Eri opens the door and enters along with her father who's looking away while mirko looks at him with anger
Ryukyu:Rumi calm down please
Mirko:I am calm
A.Izuku*ahem*Hey um sorry about earlier
Izuku:It's alright
Momo:I think we should leave you two alone
The girls get up and go outside and sit then jiro looks at eri and asks her a question
Kyoka:What happened back there?
A.Eri*sigh*Dad...used to have problems after shigaraki killed grandma inko and all might he started seeing things
Momo:What kind of things?
A.Eri:Their bodies dead on the floor right in front of him while shigaraki laughs at him but it gets worse sometimes one of us is replaced by shigaraki and he looses control and tries to hurt him well the person he thinks is shigaraki he almost killed you once*looking at momo*
Ryukyu:So that's why he came alone
Yui:He wants to prevent that the same thing happens to this izuku
Meanwhile:
A.izuku:Hey uh again sorry for what happened
Izuku:I told you it's alright things happen ok
A.Izuku:I have this-
Izuku:I know,eri told me yesterday
A.Izuku:Huh did she now listen i want you to know that-
Before he can continue an alarm is heard he gets up and looks outside only to see the gate destroyed and shigaraki walking inside
A.Izuku:Shit,do you have your suit?
Izuku:I have had it on since this morning
A.Izuku:Didn't notice
Momo and the other girls burst through the door looking worried
Momo:What's going on?
A Izuku:He's here wait where are the kids?
Itsuka*eyes widen*Oh no
At the front gate:
We see inko running away while carrying nana with the other kids following behind until ryu decides to stay behind
Mikasa:Ryu what are you doing?!
Ryu:I will handle him
Emma:Are you crazy?!
Hisashi:You can't do that you're just a kid
Ryu:So what the old man is not here so i will distract him until he shows up now go
Takeo:But-
Ryu:Go!!
They keep running and hide inside the building while ryu stands in front of shigaraki and shigaraki looks at him in curiosity
Ryu:All right you villain*starts releasing smoke*you can stay away
Shigaraki just looks at him and starts walking towards him and using air cannon he sends air shockwaves to get rid of the smoke he gets close to the kid ryu goes to punch him but shigaraki grabs him by the neck his brothers and sisters scream when they see this
Shigaraki:You're just a brat but you're one of his brats so you will be useful
Ryu:Get your hands off me you crusty lips have you ever heard of chapstick
Shigaraki:Shut up!! Izuku midoriya come out come out wherever you are i just want to talk
Suddenly izuku and the girls arrive at the place only to see shigaraki holding one of his children hostage
Kyoka:RYU!!
Izuku:Tomura!!
Shigaraki:Ah there you are just the person i wanted to see
Izuku:Let my son go tenko
Shigaraki:Don't call me that!!
Izuku:Come on im the one you want so just let him go
Shigaraki then starts talking to himself and lets him go ryu gets up and runs towards his mother who hugs him tight
Shigaraki:Izuku midoriya i will take one for all from you
Izuku:You already tried that sorry it didn't work out for you
Shigaraki:Grrr SILENCE BOY!!
Izuku:That was all for one talking Girls please get out of here this between me and him
Shigaraki launches black tendrils at izuku who dodges and starts running towards the forest where shigaraki loses sight of him
Shigaraki:Grr where are you
???:Looking for me?
Shigaraki:Wha-
He was suddenly punched in the face sending him away
A.Izuku:I think that will piss him off even more
Izuku:Y-yeah
A.Izuku:How much of ofa can you use?
Izuku:Umm 60%
A.Izuku:That will be enough
He charges ofa at 100% and goes towards shigaraki who starts sending tendrils towards him and he dodges all of them he gets close to him and kicks him in the ribs but grabs him with black whip and throws him to the sky but shigaraki grows wings and flies towards future izuku
A.Izuku:Great he has wings now
Shigaraki:So this is your future self you're strong
A.Izuku:Thanks i trained a lot
A tendril was going to stab him in the back but thanks to danger sense he moves out of the way
A.Izuku:It's that all you got?
He's then tackled by a nomu that came out of nowhere
A.Izuku:I should had stayed quiet
Izuku:Need help?
A.Izuku:Sure
Both of them start fighting the nomu while shigaraki watches
Afo:Take this chance tenko kill them and take one for all
Shigaraki:No i will wait
Back to the two izukus they are still fighting the nomu who is throwing trees at them
Izuku:Delaware smash
The blast sends the nomu back and both of them decide to attack it together
A.Izuku:Double...
Izuku:Detroit...
Both:Smaaaash
They hit the nomu and it blows up from the force of both punches combined they start panting heavily but future izuku then gets stab by a tendril courtesy of shigaraki
Izuku:Noooo
A.Izuku*cough cough*
Shigaraki:What a shame*stabs izukus leg*
Izuku:Ack...Shigaraki stop this please
Shigaraki:Tomura is curtently unavailable
Izuku:All for one
Shigaraki(afo):I have control over his body it was hard but i managed
Izuku:No
Shigaraki(afo):You were trying to save him,that was just an impossible task he was already to far gone to be saved
Izuku:Tch
Shigaraki(afo):Now i think i should take what belongs to me
A.Izuku:No you won't
He goes for the punch but shigaraki or all for one sides steps and touches his arm and starts decaying it he screams in pain but manages to headbutt all for one who stumbles back
Izuku:Tenko i know you're in there please fight against afo!!
Shigaraki(afo):It's useless he can't do tha-aaaaah please!!-I-impossible how can this-aaah please kill...me
Izuku:What?
Shigaraki(afo):There's no other way aaaaaah-Enough i will kill you midoriya and then i will take one for all
Izuku gets up and starts moving towards him
Shigaraki:What are you doing?
Izuku looks at his future self who only nods at him izuku looks back at his enemy
Shigaraki(afo):If you're going to stand there i might as well take-
Izuku uppercuts him and sends him flying to the air he activates float and grabs him with black whip and holds him
Izuku:I tried to save you but i guess you can't save everyone heh One for all 100% now i must defeat you it is my duty as the 9th holder of one for all to end all for one and in order to do that i must break my limits and go beyond Plus ultra UNITED STATES OF SMAAAAASH
Izuku hits him and they start falling down of the sky both crash creating a huge cloud of dust and a crater everyine goes to check it out and they see izuku getting up breathing heavily and the body of shigaraki
Izuku:Im sorry...tenko
Bakugo goes towards him and grabs him so he doesn't fall
Bakugo:You did it you defeated him
Izuku:Yeah...i did
Timeskip:
We see izuku in front of the future izuku who has a cast on his right arm
Izuku:How's your arm?
A.Izuku:It will heal i might not be able to do heeo work for sometime but hey i think i needed vacations anyway
Izuku*chuckles*
A.Izuku:Hey...you did good
Izuku:Yeah but i wish i could have saved him
A.Izuku:We can't save everyone everytime but i guess you already knew that
Izuku:Yeah
They both see the kids approaching them with their mothers
A.Izuku:Well i think it's time for us to leave
He opens the portal and they stand infront of it the kids wave goodbye to everyone and enter future izuku turns around and looks at his younger self
A.Izuku:Goodbye little me don't do anything stupid
Izuku:How can i you're taking all the stupid with you
A.Izuku*chuckles and enters the portal*
Momo:Should we head inside?
Izuku:Yeah im tired i want to sleep
Mirko:Oh you ain't sleeping big boy
Izuku:Oh boy
In the future:
We see everyone infront of the machine waiting for izuku then they see his silhouette and he starts walking out and momo it's the first one to go towards him and hug him
Izuku:Ow momo that hurts
Momo:What happened?
Izuku:A lot of stuff it's a long story
???:Eri!!
Eri:Katsuma
They hug and kiss eachother while izuku smiles watching the interaction katsuma looks at him and he nods
Katsuma*ahem*I don't think this is the right moment for it but i can't wait any longer...Eri
She looks at him and sees him getting on one knee and getting a box out of his pocket and she starts to tear up
Katsuma:Eri midoriya would you marry me?
Eri*nods crying*Yes yes i will marry you
They kiss and everyone celebrates izuku claps while smiling happy for his daughter then he looks at the roof
Izuku:I wish you could be here to see this mom
He then looks infront of him and he sees his mother and all might looking at him with smiles letting him know they are proud
Izuku:I miss you guys
Momo:Honey come on let's go celebrate
Izuku:Sure let's go