That hug.

That one, all too brief hug.

It had consumed him like nothing else he'd ever known.

To say that Hiro was completely unfazed by Go Go would be untrue – their first meeting at the Robotics Lab had certainly left a lasting impression on him. Of all the things he expected to find in the 'nerd school', this awesome female speed demon was not one of them.

Aside from thinking how cool she was, he hadn't thought much more of her.

After his brothers funeral, when she and the other students gathered together to be there for him and his Aunt Cass, he still saw her as just one of Tadashi's friends.

Even while designing the armour and weaponry for the newly established team of superheroes, he was equally impressed by her as he was by the others.

But after it all went down at the abandoned Krei Tech lab, and his teammates came to see him in his garage workroom, she pulled him in for a comforting hug.

And something changed.

A peaceful sensation swept over him as he listened to her heartbeat. Her warm and sincere embrace felt so reassuring, so soothing; in that one moment, he was overwhelmed by a strange feeling. All too soon, that hug was over, and he found himself looking directly into her soft brown eyes as she reassured him that they would stop Professor Callaghan.

That was almost two weeks ago.

Their bittersweet victory over Callaghan had been all over the news. After the battle, Hiro finally felt ready to move forward and had registered at San Fransokyo University the very next day. It had been a challenge – even for a prodigy like himself – to rebuild Baymax. He would have finished sooner, had he not been distracted every time Go Go walked past this work space.

The POP of her bubble gum made him jump.

The sound of her footsteps made him freeze up.

Every now and then he would glance over at her, only to feel his face burn furiously when she caught him looking.

Even now, as he sprawled across his bed, he was so confused.

He was acting so strangely, and all over a girl; it was just weird. He looked over at his brother's side of their shared bedroom, if you could even call it that – Tadashi was a such a nice older brother that he let Hiro take over two thirds of the room with his chaos, leaving the older boy with what amounted to an alcove-like corner for himself.

"Tadashi…" He mumbled.

Hiro sat up and sighed. No doubt he would never get over the pain of losing his brother, but he was comforted by the creation he left behind.

Baymax currently stood in his red charging dock, silent.

"Ow…" Hiro said out loud, knowing that Baymax would hear it and activate.

Sure enough, the white squishy robot opened his eyes and turned to look at the young boy.

"Hello Hiro," He said. "Do you require my assistance?"

"Baymax, my head is all over the place, think you can scan me and see if there's anything wrong?" Hiro asked.

"Of course," He replied as the whirring of his scanner rang out. "Scan complete."

"Well?"

"You are experiencing a rise in oxytocin, dopamine and norepinephrine levels, your serotonin levels have decreased and there is an increase of blood flow in your prefrontal cortex," Baymax announced. "Diagnosis; interpersonal affection."

Hiro raised an eyebrow at the marshmallow-like robot.

"What you are going through is perfectly natural," He insisted. "Commonly known as being in love."

"What?" Hiro yelled, almost falling off the edge of the bed.

Love? Seriously? No, there was no way he could be in love with Go Go, he'd never even had a crush on anyone before! Not to mention the age difference between them; he wasn't even 15 yet, and she had to be at least 18 years old! No. He refused to accept it. There must be another explanation – Baymax probably needed rebooting or upgrading or something.

"Can't be that, Baymax, it's probably just a virus," Hiro maintained, shaking his head. "We should take a look at your programming, make sure there are no bugs in your system."

"I fail to see how there could be bugs in my system," Baymax answered. "Tadashi programmed me with firewalls to prevent malware infection when downloading additional healthcare data; the diagnosis is accurate."

"Baymax, I am not in love with Go Go!" He snapped.

"What?" gasped a female voice from behind him.

Hiro turned around to see his Aunt Cass standing at the top of the stairs leading into his room. Immediately he hid his face in his hands, the only way this could be more embarrassing was if it had been Go Go herself standing behind him.

"Hiro," She smiled. "Are you in love with Go Go?"

"Yes, I mean, no, I mean… ugh… she's awesome and I respect her, but it's impossible," He denied as his face started turning red. "I can't be in love with her."

"Why? Doesn't she like you back?" She wondered, smile fading slightly.

"It's not that, I don't even think she sees me as anything but Tadashi's little brother," He frowned. "And this is all just way too sudden, you know, I haven't known her long enough to even have a crush on her."

Aunt Cass smiled again, leaning down so she was face to face with him.

"Did I ever tell you about how your parents met?" She asked.

"Yeah, you told me they met at school."

"Well, that's not the whole story," She admitted.

Hiro looked up at her with confusion and doubt written across his face.

"Your mother was in her senior year of university, and was doing tutoring on the side to earn some extra money," Cass mentioned. "Your father was in his junior year of high school and failing math; badly."

Hiro eyed her sceptically as she continued the story.

"Our parents had no issue with her tutoring him, until they started getting close," She stared off to the side, her eyes glassy with nostalgia. "She used to go on dates all the time, but after just three weeks of tutoring your father, she started to refuse everyone who asked her out."

She sighed.

"One night she confided in me that she just didn't see herself with anyone else, that she was willing to wait for him to be old enough for them to start dating exclusively," Aunt Cass's face turned semi-serious for a moment. "She told me that during one of her many arguments with our parents over the subject, mom had called her a cradle robber for liking someone younger than herself."

She watched as her nephew glanced at the floor guiltily, as if he blamed himself for an argument that took place years before he was born.

"Hey, everything worked out, otherwise you wouldn't be here," She held his cheek and moved his face so he was once again eye to eye with her. "My point is, how long you've known a person doesn't decide your compatibility."

"But…" He stumbled. "Even if – and this is a big if – I am in love with her, she's still four years older than me."

"If she likes you back, the age gap won't be a problem." She assured him. "Your parents had an age gap of 6 years."

An awkward silence passed between them.

"Listen, I've gotta get ready to open up, but think about what I said okay?"

Hiro looked over at the clock on his desk. Time was getting on and he really needed to leave for class soon. With a heavy sigh, he grabbed his bag and headed down the stairs; Baymax instinctively followed. The university was a good half an hour walk from the Café. As he waved goodbye to his aunt and started the journey, his mind was overflowing with thoughts.

The more he thought about it, the more he realised that maybe – maybe – Baymax was right. Of course from a robotic perspective he was always right about these things, after all, his entire reason for being was to accurately detect what was wrong with a person and treat them for it. Perhaps whatever it was he felt for Go Go had been there since they first met, and it was only now that those feelings had evolved into something more definable.

He had been so lost in his thoughts that before he knew it he was walking through the doors of the robotics lab.

"Yo, Hiro, Baymax, over here!"

It was Fred in his mascot suit, waving them over to where he was practicing his sign spinning.

"Hey Fred, 'sup?" Hiro grinned.

"Oh, nothing, just working on some new moves for the open day next week," He said. "You working on your microbots today?"

"Yeah, I was thinking about adding an inhibitor to their programming," Hiro answered. "They were a great idea but the incident with Callaghan made me realise how easily they could be exploited."

"Awesome," Fred smirked.

As Hiro and Baymax headed into the main part of the lab, he looked around to make sure the coast was clear. There were a few other people in there, working on their own projects, but no sign of Go Go. Hiro breathed a sigh of relief as he walked through to his work space in the far corner. Most people liked working in the open area of the lab, but he preferred the quiet and seclusion of his brother's old office at the back.

"Hey Wasabi," Hiro called out.

"Hiro!" He smiled and waved.

Hiro approached Wasabi's work space, where he appeared to be working on his superhero armour.

"Should you be working on that in here?"

"Shh," He whispered, shifting his eyes from side to side. "I'm only doing a bit of tweaking on it while it's quiet – most students don't show up until after lunch so I figured this was the best time to do it."

Hiro rolled his eyes and smirked at his teammate's brazen decision.

"Have you made the plasma blades more jagged yet?" Honey Lemon yelled over the music in her earphones.

"Honey!" Wasabi snapped. "You wanna tell the whole lab?"

"Sorry," She apologised, pulling her earphones out and lowering her voice.

"I'm still working on it," He told her. "It's taking longer than I thought."

"You're making them jagged?" Hiro questioned.

"It'll be just as accurate but will do more damage." He replied proudly.

"I'm sure it will be amazing when it's done." She smiled.

"Well, let me know if you need any help," Hiro offered as he continued on his way.

As he opened the lab door he noticed Baymax had followed Honey Lemon over to her desk to see what she was working on. Hiro chuckled to himself – Baymax was a complex machine programmed with 10,000 operations and procedures but he also had a curious streak that sometimes got the better of him.

He went over to the window and put his bag on the side table. Suddenly, he was struck by the feeling that he wasn't alone. He whirled around to find Go Go standing in front of the door with her arms crossed, blocking his only exit.

"Uh, hi Go Go," He mumbled, trying to avoid eye contact with her. "How's it going?"

"Fine, thanks," She said, popping her bubble gum.

She began to approach him, and he quickly backed away and sat in the swivel chair by his desk. He grabbed his notebook and a pen and started making notes on how to integrate an inhibitor into his microbots, desperately pretending not to notice that she was standing right behind him. His face was burning up at her mere presence.

Go Go leaned over him, trying to see what he was writing. Hiro froze completely. The feel of her body pressed against him was creating a lot of problems – he couldn't even think, let alone attempt to move away from her. Part of him didn't want to move, she was providing him with the sweet warmth he craved since that hug a couple weeks ago.

"I don't think that's going to work," She commented as she observed his writing.

"Oh." He managed to say in response.

Still leaning over him, she placed her hand on his forehead.

"You have a fever, and you're acting weird – well, weirder," She said. "Want me to get Baymax to take you home?"

"I'm fine," he squeaked.

She stepped back and moved his chair round so she was looking down at him.

"You sure you're okay?" She popped her gum again. "You seem really off."

He refused to look at her, knowing that his already red face would probably go even redder if he saw those sparkling brown eyes of hers.

"Listen, Hiro, we need to talk."

Immediately his heart sank and he continued to look away from her.

"I know we're teammates," She began. "And I know nothing should get in the way of that…"

Suddenly it was she who turned away. Slowly, he dared to glance at her, only to see that she too had excess colour in her cheeks. She sighed heavily.

"Look, there's something you need to know."

Go Go started drifting around the office.

"When your brother died, everyone here was hit hard by it – I can't imagine how hard it was for you," She softly crossed her arms, holding herself. "I was so happy when you started hanging out with us, it was like we had him back again."

She leaned against a wall while Hiro stared at his feet.

"I get so confused when I look at you, Hiro, you make me feel things; things I don't understand."

The teenage boy wondered where she was going with this. It couldn't possibly be going the way he began to suspect it was.

"At first, I thought it was because I missed Tadashi, but you aren't Tadashi," She stated bluntly. "Even when I realised that, those feelings didn't go away."

Go Go began wandering around in a circle. Why was this so hard for her? She was being completely silly.

"I don't want you to think badly of me, but you need to know this, and I can't keep it to myself anymore." She took a deep breath.

He couldn't help but notice the colour of her cheeks had gone from light pink to a heavy magenta.

"Hiro…"

She saw a glimpse of interest on his face, like he really wanted to hear what she had to say. He also seemed to be blushing as much as she was.

"I… I like you, okay, a lot," She finally said, rubbing the back of her head nervously. "I like you so much that it hurts, literally hurts, when we're apart."

He stared at her in disbelief.

"I know this is girly and stupid and this isn't who I normally am, but keeping it a secret was driving me nuts," She took another deep breath and her face was so hot it felt like it was on fire. "Look, Hiro, I'm sorry if this is making you uncomfortable, but I had to tell you… I'm in love with you…"

Still stunned by the bizarre revelation that she felt the same way about him that he did about her, Hiro had been thrown into a shocked silence. Go Go, taking Hiro's silence as a rejection of her, sighed and headed for the door. The embarrassment was just too much. THIS is why she acted hard and cold around some people, why she tried not to get attached.

Before she got to the door, she felt him grab her hand and pull on it slightly.

She turned round, red mostly from the awkwardness of what had just happened. Hiro was biting his lower lip and sported a sheepish smile, adorned by a pinkish red blush.

"Um, then I guess I have something to tell you," He confessed. "I… uh… I love you too."

Go Go gave a small chuckle as two tears rolled down either side of her face.

"It doesn't bother you," She sniffled. "That I'm older than you are?"

"If we both feel the same, the age gap doesn't matter." Hiro beamed, paraphrasing the words of his aunt from earlier on.

She pulled him towards her and enveloped him with her arms. Oh yeah, he could get used to this. Hearing her heartbeat, feeling her warmth, the sensation of her giving him that hug; the hug he wanted so much. She leaned her head on his and nuzzled into his messy black hair.

Eventually she let go of him and stepped back, a huge grin plastered across her face.

"Well, now that's out in the open," She said as she pinched his cheek. "I'll let you get on with your work."

Just then, Baymax walked in the door. Go Go waved at the giant marshmallow and went out into the main lab.

"Hiro?" Baymax queried. "Your neuro-transmitter levels have increased dramatically."

"Yep," Hiro agreed.

"Go Go's dopamine, oxytocin and norepinephrine levels were also increased." Baymax mentioned.

"Yep," He repeated.

"I am happy that things have worked out for you." The robot added.

"Yep," Hiro said. "Me too."

YAY! My first Hirogo fanfic! Might be my only one but this pairing is so cute I may write more. Hope you like it x