Prompt: Hizashi and Izuku go to an ice cream parlor to prove that they are the best pair of siblings around!
So, this was supposed to be short with multiple other fluff scenes...that didn't happen!

- - -

I know at Hizashi's door, "Sir! I'm your slave for the day!"

I have to jump back to avoid a face full of door as it slams open to reveal the man of the hour.

"You are?! Oh, this is perfect! Come in!"

I don't really have a choice as I am dragged straight to the bathroom. I don't know how, though I swear Hizashi has magical hair powers, but my hair goes from green to blonde within a minute.

"PERFECT! We will win this without a problem!" Hizashi exclaims as he ruffles my new hair. However, I don't like being in the dark.

"What the fuck are we doing that requires me to be a blonde?"

"Oh, I didn't tell you?! My bad! You know that ice cream parlor that I always take you to behind Sho's back?" This is going to be good if there is food involved, especially ice cream.

"Yeah? What about it?"

"Their hosting a sibling day! The best group of siblings gets free ice cream for the year!"

"Bitch, let's go!" I scream as I grab Hizashi and practically carry him all the way there."

- - -

"Blonde is really not my color, fam."

"You look fine, Izu! We're here!"

We enter the parlor to see so many siblings, but they went the extra mile and most dressed similar and acting memorable! We're not going to win!-

Wait, how does this work? Is it based on looks or a show or a game? HIZASHI HASN'T TOLD ME THE DETAILS OF THIS!

Suddenly, I feel the back of my collar get grabbed gently, pulling me back towards HIzashi. I look up at him with a questioning look until I see him nod forward. I turn to the direction he is nodding towards. Oh, that's a lot of people. Makes sense now!

"Yamada, Izuku! Glad to see that you two could make it- oh, that's adorable! You forced Izuku to dye his hair!" A girl that usually serves us says excitably as she approaches us. However, that statement made me questioning something.

"Hold up, is this a wig or did you actually dye my hair?"

Hizashi looks away with a nervous chuckle, "Dyed?"

"...how in the hell did yo udye my hair and make it look decent in five minutes?!"

"I don't know!"

The girl laughs at our show, "You two are as hyper as ever," she leans in and whispers, "I don't think you two will have a problem winning the competition," she straightens up, "Come on!"

"Hizashi, you didn't tell me this was a competition!"

"Izuku, you have faced villains. This should be nothing." Well, he ain't wrong.

The girl leads us to a booth, "Make sure to sit on the same side. We're starting to overcrowd."

Oof. Hizashi signals for me to go in first so that I have the wall seat. I take it without hesitation. Casually, I pull a bleach wipe out of my pocket and start wiping down said wall.

Hizashi snorts as he sits beside me, "We winning?"

"Of fucking course we're winning! I want some free ice cream that nobody can stop from me!"

As Hizashi and I chat, two more pairs of siblings are forced to join us, making we squish into the wall, but that''s not the problem. The problem is t he pair across from us that are elderly twins. Hizashi and I share a thought, and we have confirmed that the twins are sus.

I decide to distract myself from my ever-growing claustrophobia, "How do you feel about being tall now that you're in a situation like that?"

"Why you gotta be so rude?!" Zashi sings solemnly.

I join in way too happily, "Don't you know I'm human too?!"

Harmony time! "Why you gotta be so rude?! I'm gonna marry him anyway!"

Withou our luck, we are interrupted, "Shut up. Nobody wants to hear that." We find that it is the sus twin girls.

I huff, "You just don't know real culture."

"You're not even singing in Japanese." If these women are Karens, I will make sure to win to spite them.

"And that's a problem why?"

"Because Japanese is the official language here, and it should be the only language."

"Not our fault you suck at learning English."

Hizashi takes a minute to make sure he doesn't laugh, "Sorry about him. He's just a a bit stubborn at times. "

"Probably because your mother did not teach him any better." Hizashi and I are about to fight. You don't talk about our mommas like that!

Fortunately for them, the owner interrupts to start the competition,

"Welcome, everyone, to the Nice Cream Ice Cream Siblings Competition! We made this day to bring siblings together as we need to spend more time with them! For this first section, we will be asking questions about our parlor to make sure you aren't just here for the free ice cream! If you get three questions wrong, you're out! Good luck!"

Honestly, this section is easy for Hizashi and I because we come here an unhealthy amount. The next to us loss relatively quickly, so we got more space. However, Hizashi is unwilling to move his arm that had landed on my shoulders because he's too fucking tall, so we just staed close and worked like that. I wrote on the white board, and Hizashi held me down from jumping the Karens across from us?

Why did I want to jump the Karens besides for earlier? They're cheating with their quirks. How do Hizashi and I know that? Well, I have watched them look at us after every question is asked. When they catch me looking at them they suddenly look at their whiteboards and write down an answer.

Yeah, they're dumb.

Hizashi has to quietly tell me multiple times throughout the first section that fighting the elderly is illegal. I call it dumb, but whatever.

By the time the first section is over, only a quarter of us remain. This includes the Karens sadly.

The owner returns to explain the next section,

"Congratulations to those who have made it this far! You have proven that you are loyal to our franchise! Now, it is time for the actual sibling fun! Everyone will be given a whiteboard, and the siblings must seperate to different areas of the room! This time, you mustt have the same answers as them for it to be correct! Three mistakes and you are out!"

Hizashi gives me a side hug before heading to his new place. Thankfully, Hizashi and I have the connection, so this is easy. Most people don't survive the first five questions. Because of the type of questions they ask, Hizashi and I share a pretty similar mindset to it. FOr example, one of the questions was, 'who desperately needs to sleep more?' Sure, we both do, but we also have enough energy to survive a lifetime. Both of us obviously put Shouta.

Within 20 rounds, it is just the cheating Karens and us, and I am so determined to win. For the ice cream? Yes, but the level of pettiness is growing by the second.

The owner has one final challenge, "Alright, so for the final challenge, you and your sibling must perform together! You can do any performance, but here is the catch: you won't get to communicate with your sibling for it. It must be completely improvised! Then, everyone in the place will vote for their favorite! The one with the most votes wins!" We got this in the bag, "Do either of you want to go first?"

"They can," I say without hesitation, and Hizashi agrees with me. Why are we letting them go first? If they have mindreading quirks like I think they do, they'll just communicate throughout our performance. Sure, I don't know the limitations. I don't know if that if they have to see each other to do the mindreading shit or whatnot. However, I am going to limit it as much as possible. If they go first. That's less time for communication.

One of the Karens, of course, is not content with this, "You can't just listen to them! They have been cheating the whole time! One of them must have a mind-reading quirk! I believe it's that little brat!"

The other Karen agrees with her, "Of course! He kept look at us the whole time for answers!"

Time to rock their britches, "Plot twist: if I had that quirk, I would still have an arm! Actually, I'm quirkless!"

Both of the Karens immediately scramble back, "No wonder you're such a brat! You should be dead! Gone! People like you are far behind in the times-"

Hizashi raises his hand, and I turn to him to see that he is pissed. He is fucking scary if you are on the receiving end because of how much disappointment he holds,

"I highly recommend you stop talking to Izuku like that and leave unless you want to be arrested for being quirkest."

"YOU CAN'T DO THAT! IT'S OUR RIGHT! BESIDES, THE HEROES WOULD SIDE WITH US ANYWAY!"

"Good thing I am a hero then, huh? Now leave. Please and thank you!"

"You're a liar!"

Hizashi pulls out his hero license and shows it to them, "If you dare talk shit again, I will not be afraid to arrest you. Got it?"

Hizashi must have freaked them a lot because they literally ran out like the goddamn pussies they are!

I smile brightly at the man, "Thanks, Zashi!"

His seriousness drops as he ruffles my hair, "No problem, Izu!" He turns toward the owner, who had been watching the whole time, "Sorry about that. I'm just not going to let people beat him down."

The owner raises his hands, shaking them, "It's not a problem at all! In fact, I think it's amazing. I can tell you two are close! That's why I am making you the winners of the sibling competition!"

It took me a moment to remember that, "Oh shit, really? I kind of forgot about that. I was getting ready to debate them."

"Of course! I would be terrible if I just ignored that display!"

As soon as I got the guarantee, I jump Hizashi, "YIPPEEEEEEEEEEEEEEEEE! WE WON! WE BEAT THE KARENS! WE GOT THE ICE CREAM!"

Hizashi easily catches me and spins us around, "YES YES YES!"

And that's how we won a years worth of ice cream and pissed Shouta off!