*STICKS LEG OUT* Talk to me about Dad-might.
Oh, friend, I don’t think you actually want me to. BUT I’M GONNA DO IT ANYWAY.
So. Following the premise (which, for those of you that don’t want to read, is basically right after All Might’s fight with sensei; he’s been discharged from the hospital and is Sad and Introspective™ and then he meets a lil’ Izuku who is all determined and adorable about his dream to be a hero so All Might is all *wipes tear* “my son,” basically deciding right there that he’s going to help Izuku achieve his dream. I’m good at summaries don’t judge) All Might is probably thinking about his rather (read: very) impulsive decision to reveal his identity to Izuku. And regretting it.
Because Izuku is kind of about to combust -
Okay that’s admittedly a minor reason in the long-run. He is, mostly, realizing that despite his determination Midoriya is very much a child - “how old are you?” Midoriya momentarily stops his fanboy-induced freakout to grin toothily and hold up nine fingers, “I’m nine!” - he is a nine year old boy and even if a part of All Might has taken a shining to the child, he is nine and One for All would kill him, and his thoughts are something along the lines of “what the heck was I thinking?”
But then Izuku looks up at him, all wide, hopeful eyes and gives him a heartfelt, “thank you.” Because no one ever believed that he could become a hero. In his entire life, All Might is the first one to tell him that - and how awesome is that? The hero, the #1 hero, All Might! His idol! Thinks he can become a hero!
He says that he doesn’t really know how he’s going to do it, but he’s certain that with All Might’s help, he’ll be able to become a hero. He starts to tear up to All Might’s silent horror, but (thankfully) wipes his eyes.
And All Might is about to say something but -
Ofc Izuku is super worried, and suddenly he remembers that, yeah, this is what All Might looked like when he walked up to him, and he didn’t really realize it until now. He asks why he looks like this, and Toshinori tells him. *cue informational speech/monologue about his fight with a certain villain that occurred recently and left him like this*
Toshinori carefully keeps the truth of his quirk quiet. He doesn’t actually know if he will choose Midoriya as his successor, but he will at the very least help train him in case he does.
So: cue training. And bonding. FRIENDSHIP.
FATHER-SON-BONDING, IT’S DAD-MIGHT, DAD-MIIIGGGHHHTT *COUGHS*
The comic “training” that I made probably fits somewhere around here.
Toshinori accidentally introduces Recovery Girl and Izuku to each other at some point. He’s probably on his way to visit her one day, and Izuku runs into him (because the boy has somehow developed some kind of inhuman radar that almost guarantees that Toshinori is going to encounter him at least three times a week) and promptly decides that he’s going to accompany him for the day.
It’s a little funny, because while in his real form, Toshinori realizes that Izuku is a lot more brazen as opposed to when he is All Might. It might have to do with the blood he’s constantly spewing though, and Toshinori also realizes that he’s got a bit of a mother-hen in Midoriya. He’d bring jackets, scarves, heating pads, 2-liter water bottles, and many other kinds of items for Toshinori’s benefit.
(At one point, Midoriya had asked Inko for help. She had asked, “what do you need?” He had then told her that a friend of his spewed blood everyday and he wanted to know how to help. Inko had promptly freaked out because “VOMITING BLOOD WHAT,” causing Midoriya to freak out even more, which resulted in him being even more cautious regarding Toshinori’s condition.)
Anyway, meeting Recovery Girl. She’s curious about Izuku, who is half-hiding behind Toshinori, but otherwise doesn’t really pay him much mind as she says, “you’ll need to have your stomach removed.”
Izuku freezes, Toshinori nods as though he was expecting as much, and she gives the rest of the explanation. By the end of it, Izuku is pale as a ghost, and before they leave, he asks her: “is there anything I can do?”
Toshinori is a little dumbfounded at the question, but Recovery Girl considers him thoughtfully. She kicks Toshinori out of the office for a bit, and sits Izuku down to talk.
“I’ve heard quite a bit about you from Toshinori,” she begins, smiling kindly. “And I have to say I agree with him, despite the circumstances. You’ve got a good head on your shoulders, and a good heart.”
Izuku is kinda ??? but nods anyway, feeling complimented but not really understanding what she’s getting at.
“Just be yourself,” she adds, reaching out to ruffle his hair. “He doesn’t really have a lot of people he can rely on, being the number one and all. Everyone relies on him, whether it’s as a hero or a symbol of hope. Be yourself, and you’ll be helping him plenty.”
Izuku nods absentmindedly, and asks, “but what if it isn’t enough? What if he gets hurt again?”
Recovery Girl slants a look at the door before looking back at him, an almost secretive but still kindly smile in place. “Well. Exercise is good for the body and soul.”
Then she kicks him out, and Toshinori and Izuku spend a chunk of the afternoon training more, the former a little more silent than usual and the latter determined. Also, Izuku ends up following Toshinori to his apartment because “I have to make sure you’re alright!” and Toshinori, on a whim, accesses his quirk, flexes, and says “I’m ALL MIGHT!”
He immediately spews blood because that pun was Fucking Terrible
and I deserve to rot for even thinking of it
Silliness aside, he pats Izuku’s head and says “thank you, but I’m fine. You’ve done enough, Midoriya-boy.”
Izuku stares at him for a moment, and before Toshinori can ask if there’s something wrong, Izuku jumps forward and hugs him.
I’m gonna stop there because this is killing me, I love Dad-Might and Mini-zuku so much GAH TOO MUCH, ADORABLE-NESS OVERLOAD. FUKC
At some point, Izuku also probably shows Toshinori the sketches he has, plus the notes. Particularly, his dream-outfits for if he ever became Mighty-boy.
Toshinori is suitably embarrassed/flattered/”omg this boy is so earnest”/wat-do while lil’ Izuku is just smiling proudly.
…I literally just realized that you probably just meant Dad-Might in general, not the Dad-Might&Mini-Deku AU, as I’m posting this. With the drawings already finished. I’m sorry for the figurative avalanche of plot I dumped on you LOL *lies down on the floor face-down*
That aside I could probably talk aaaall about (and how much I love) the Dad-Might headcannon, but it’d mostly be incoherent words and screaming