Ever since I saw Big Hero 6 for the first time back at the beginning of December, I've been DYING to write this crossover.

Just a few things you should be aware of:
1) This version of Matt is based off of my personal interpretation from my rp blog for him on tumblr
2) This is the first time I've written any of the BH6 characters, so there may be a bit of OOCness
3) This story is unbeta'd and my writing isn't that great atm. Please bear with me, I do tend to improve over time.
4) There will be pairings later on in the story(I wont say what they are, but you'll probably guess anyway). Rating may change.

This is the first fic I'm posting on AO3. If it gets good feed-back, I might start posting my other fics too.

EDIT: I didn't realize until this morning that I had posted the original drafted version of this chapter, so it's now been updated.

Hiro was confused, which was not a state he enjoyed experiencing.

And not only was he confused, he was irritated. Here he was, ten minutes early for his Calculus class, as usual, and someone was in his seat.

Some kid, at that – not that Hiro had much room to talk. The kid, from what Hiro could see from behind, was about the same height as himself, and nearly as scrawny. His hair was only a shade lighter than Hiro's and he was dressed annoyingly well; with black slacks and a pale green dress shirt. It was difficult to tell, from behind, but if he had to guess, he'd say the kid was his own age.

"Hey," he said as he approached the kid. Said kid didn't react, except to turn off his tablet and look at Hiro. For a moment, Hiro was caught off-guard by the intensity of the kid's bright green eyes. There was no way those were natural...

"Yeah?" the kid asked, snapping Hiro out of his thoughts. Slightly embarrassed, he scowled.

"That's my seat," he told the new kid. He did not whine as he said it.

"Really?" the kid asked, "I don't see anyone's name on it." He made a show of looking for any such claim and gave Hiro a smirk when he saw nothing. Aside from a crudely drawn penis on the corner, but he doubted that was the other boy's name.

Hiro grit his teeth and huffed through them. That was his seat, goddammit! It was the best seat in the room, at just the right place to seem like he was interested, but just far enough away that the teacher wouldn't call on him. It was perfect and he wasn't about to let some upstart newbie(never mind the fact that Hiro ihimself/i was a newbie) take it!

"What are you doing in this classroom anyway? Shouldn't you be at middle school right now or something."

Now it was the new kid's turn to scowl. "I have just as much a right to be here as you!"

"Pssh, you don't even know who-"

"Hiro Hamada," the kid interrupted. Hiro blinked, thrown both by the interruption and the fact that the kid knew his name.

"How do you-"

"I've heard a lot about you," the kid interrupted again.

"Will you stop that!" Hiro demanded loudly, and the kid had the nerve to laugh at him. He had to physically stop himself from stamping his foot like a child. Taking a deep breath, Hiro counted to ten(a relaxation exercise Baymax had been urging him to use to help his 'pubescent mood swings'). The attempt was only partially successful.

"And where exactly have you heard about me?" he finally asked.

The kid waved him off. "Doesn't matter."

"It does t-"

"Mr Hamada, please take a seat." The interruption came from his – their, apparently – teacher, Mrs. Sullivan, this time and Hiro wanted to scream from the injustice of it all.

He gave the kid a nasty glare and finally dropped down into a chair three rows away from his seat while the rest of the class started filing in. Mrs. Sullivan set up at her podium and gave the new kid a cordial nod before beginning her usual boring lecture.

"Good to see you in class, Mr. McGinnis. Now, continuing from last week's topic..."

Honey Lemon, Gogo, Wasabi, and Fred were finding it incredibly difficult to contain their laughter as the smallest member of their group ranted and raved about the new jerk in his class.

"-and then he interrupts me! Twice! Can you believe that?" he ranted, just below a shout. He held up two fingers for emphasis and waved them in his friends' faces.

Wasabi pushed Hiro's hand away and rolled his eyes. "You sure you're not just making a big deal out of nothing?" he asked. Hiro glowered and crossed his arms.

"I am so not! You weren't there, Wasabi! He was just so- so," he flailed a bit as he searched for the right word and then grunted, "smug."

Gogo snorted and nudged Honey. "Sound familiar?" Honey nodded and giggled behind her hand.

"I am nothing like that jerk!" Hiro all but howled in rage. Gogo and Honey just laughed while Wasabi and Fred shared grins.

"Hey, just look at it like this, little man," Fred began, ignoring Hiro's indignant huff at the nick-name. "You can finally have a friend your age that actually keeps up with you! I mean, he's gotta be pretty smart if he's in the Robotics program. And on a scholarship, too."

"We have a scholarship for the Robotics program?" Honey asked, blinking curiously.

Wasabi shook his head. "No, I think he's got one of those Martha Wayne Foundation scholarships," he said.

"Oh! Those are like super rare. The foundation only awards five every year and the students are hand-picked by Bruce Wayne himself!" Fred added.

The rest of them stared at him like he had two heads for a moment before Gogo spoke up.

"How do you even know that?"

Fred blinked. "Bruce Wayne's got a loooong history with Batman. And he brunches with my dad," he told them like it was nothing big.

"Well then," Honey mumbled.

"Look, it doesn't matter how McGinnis got here or whatever! Can we stop talking about him now, please?" Hiro said loudly, bringing their attention back on to him.

"...maybe he's jealous," Fred stage-whispered to Wasabi, who choked back a laugh.

"Alright, that's it! I'm going to my lab!" Hiro yelled, throwing his hands up in frustration. He pushing past the group and stomped out of the common lab, grumbling under his breath the whole way. He ignored the giggles that followed him out and headed to his personal lab.

He stopped short at the door before his and stared at the name on it.

'M. McGinnis'

"Oh, you have got to be kidding me!"

End Notes:

1) according to Hiro's Journal, he does take a Calculus for Engineers class and it is taught by a Sullivan, though they didn't say whether it was a make or female(or neither) and I just decided to go with female.

2) the Martha Wayne Foundation is a thing that exists in DC continuity, and it does deal in education. I made up the scholarship, though, so if it seems off or unrealistic please tell me.