Prompt: What if Sir Nighteye found Izuku instead of Shouta?
Basically, Sir Nighteye (Mirai Sasaki) being a replacement of Shouta.
This starts a week after UA starts, so Izuku is in the Hero Course and everything. I decided to do a small scene cause why not?

- - -

"Aizawa, what in the fuck am I doing here?" I ask when he drags me by his stupid scarf into the teacher's lounge.

"We're having a conference with your parent," Aizawa says with no amusement as he sits down on the couch.

"Why?"

"I don't know how to handle you. I don't know how you're with an agency already with how much trouble you cause."

"That's the exact reason I got an agency! Though, I don't see what you plan on getting out of my mom. She still can't get a handle on me: she just supports my endeavors."

"Good thing we aren't talking to her, then."

"...what? She's the only one on the paperwork." Hold up, who are we talking to then?

"No. Your father was on there. Your mom recommended I called him instead."

Everything clicks, and I immediately stand up, "Nope, nope, nope. I maybe do some stupid shit, but I have enough self-preservation to avoid this."

"Problem child-"

I am already walking to the door, "You don't understand how gruesome that man is! He's innocent compared to you-"

As I am about to open the door to leave, it suddenly opens to reveal someone who I rather die than face his consequences.

Sir Nighteye, or Mirai in my case since he knows me too well.

Mirai looks down upon me like I'm a fucking child, "Hello, Izuku. How are you?" You know, this would be a normal conversation for most people. By his tone, Mirai is passive-agressive, meaning he is PISSED with me. Sure, he has never screamed at me or anything, but honestly? That's worst.

I offer a smile, "I'm pretty good! It's the usual tea, you know? Now, if you can excuse me, I'm going to head to the support lab-" As I attempt to go around him, his hand lands on top of my head to stop me.

"Is that so? Then why was I called due to you causing disruptions across campus?" Fuck fuck fuckity fuck fuck.

"I have no idea!" I say with enthusiasm.

"Then let's talk to your teacher and see." I don't even get a chance to run as he nearly drags me by the hair in front of away, "Hello, Eraserhead."

"Hey, feel free to take a seat. This is going to be a while, " Aizawa says as he signals to the couch in front of him. Mirai lets go of my head and sits down, glaring at me to join beside him. Bitch, I ain't facing that. Before I have a chance to start fidgeting, he pulls a small puzzle box out of his pocket and hands it to me. He did get a new one. Subconsciously, I start messing with it to get it complete. I see Aizawa watching, but he doesn't say anything about the matter.

Mirai clears his voice, "Can you explain to me what your conversation earlier was about?"

Aizawa pulls out his phone and hands it him, "That has most of the videos of what he has done during his time here. There is more, but the brat hacked into the system and removed some of them for some reason. In summary, Izuku has continuously challenged one of his classmates, will not settle his language, and has performed multiple pranks on and with the UA staff."

Mirai watches the videos quietly, and I have to say that I will probably hack Aizawa's phone later and steal them because they are fantastic. I think he knew I was thinking that because he looks at me with a warning that says 'if you start any more shit I'm going to make you suffer worst', and I am aware that my punishment is going to be horrible already.

However, in the middle, when I am working with Hizashi and Nemuri on blasting something in the cafeteria, he does ask, "How were you able to convince those two to go along with it?"

Aizawa easily answers it for him, "They have the same energy as the kid."

I clear my voice, "We had the connection!"

Mirai looks at me for five seconds before deciding that it isn't worth and continues.

By the end, he looks so done with me.

Mirai sighs, "I'm sorry for the trouble that Izuku has caused. I thought he would control himself like an adult, but he clearly can't." HE ISN'T PULL THAT CARD, IS HE?!

Aizawa nods to him, " Do you have any ways of getting him to calm down or punishing him? I tried detention and making him work out, but it doesn't seem to affect him."

"If he's going to act like a child, then treat him like one." NO! HELL NO!

I intercept, "That's abuse."

"Unless you want to be on paperwork duty all week in my office as well, I recommend you be quiet."

"Can I take that over whatever you are planning?"

"There is not negotiating this, Izuku."

Aizawa looks between us strangely, "What do you mean?"

"Whenever Izuku acts up, just treat him as you would a child: limit his rights. Put him on a child leash and make him stay by you. If he becomes stubborn, don't allow him to participate in any activities for class. Just bore him. The more public, the more it causes him to straighten out."

Once again, I interrupt, "That's unfair."

"Should have thought of that before causing trouble. I told you what would happen if you did."

"I don't know what you expect."

"I expect a genius to act right when needed. There are times for fun, but you don't seem to realize when that is still."

"Yada yada."

Aizawa hums, "You plan on punishing Izuku?"

"Yes. You don't have to do anything this time as Izuku should settle down by the time the weekend ends. However, if he doesn't, call me."

Mirai and Aizawa discuss some more until the meeting FINALLY finishes!

I hop and get ready to zoom only for Mirai to stop me, "Izuku, put your leash on."

I spin to him faster than the song can sing, "HOLD UP, WHAT?!" This man has the nerve to hold up that cursed harness and leash.

"Would you rather I hold your hand?" He really knows how to grind my nerves. Growling, I snatch the harness, put it on, and throw the leash as Mirai for the level of saltiness I am feeling.

Aizawa walks Mirai and I out, and I think he did it only to watch me suffer.

Mirai turns to Aizawa, "Thank you for telling me about my son's behavior. I promise he will improve the next time you to meet." I look up at him shocked. I have no words. He is pulling the worst punishment in front of him.

Aizawa raises an eyebrow, "Son?"

"He's required to call me Dad for a week along with stay on the leash at the agency. You have to do what you can to get him to learn."

I snap, "Uh, how about no?"

"And what makes you think you're getting out of this?"

"I can just drop out of your agency."

"If you leave the agency, I will just come home with you and straighten you out there. You are not getting away with this." The worst part is that he has, and he will do it again.

I huff, "This is unfair."

"We both know that I am trying to help. Your biggest flaw is that you are too impulsive, and that will lead to issues."

"I'm aware. No need to bitch-slap me with the truth."

"Language, son." I'm not making my hole any deeper. If I trigger him more, I think he will come over to my house.

"Got it."

"Yes, Dad."

"...yes, Dad..." For the first time today, he looks down at me with a half-smile and ruffles my hair.

"You are getting better at picking your battles. Anyway, Eraserhead, we shall get going. Thank you for teaching Izuku, and I wish you luck."

To be honest, Aizawa almost looks shell-shocked that someone can control my ass. He would if he didn't have a blank face. He simply nods and returns back to the building.

Mirai tugs at my leash and leads the way to his agency, "Now, actually tell me how was your day."

Damn, he is pushy. Though, I guess that's how he needs to be in order to get things through my head.

I may want to punch him in the face sometimes, but I will punch people in the face if they even attempt to insult him.