Disclaimer: Big Hero 6 is owned by Disney Animation.

Prologue – While The Sun Shines

"And there's your change. Have a wonderful day!"

Cassandra Hamada watched as her latest customer walked over to the far counter, a steaming cup of coffee in her hands. She wasn't sure why the man would need coffee this late in the evening, but studying people and their habits was something she enjoyed doing when she had a break.

She grabbed a towel and started wiping off the counter. Being a Sunday, the Lucky Cat Cafe was only going to be open for a couple more minutes. She also knew that her nephew would be home soon, which was a welcome change of pace as of late. It seemed like he was spending every night out late at the university, working on something important.

One of these days, she would need to ask him about these projects of his.

The phone underneath the counter started to ring. Cass checked quickly to make sure the man didn't need her attention and picked it up.

"Lucky Cat Café. This is Cass speaking."

The other person on the line greeted her as she started sorting her serving cups into the cabinets.

"Hi, sweetie! How are you? I haven't seen you around here in a little bit. Everything going OK?"

The concerned tones of the person's voice caused Cass to frown as she listened to her situation.

"Oh no! That sounds terrible." She leaned onto the back counter, looking outside. "How long is it going to take?"

She waved to the last customer walking out the door, the next few sentences coming over the phone.

"And you can't stay in the house at all? I guess that would make sense; they don't want anyone to stay in the house when they're strengthening the foundation. Just imagine what would happen if it collapsed while you were staying inside. I remember when we had something similar here; this place is really old as well. Hiro, Tadashi, and I had to go to a hotel for three days."

The voice affirmed the last part of her small story.

"There's not anywhere else you can stay?"

Cass's brow narrowed as the other person sadly told her tale.

"No. You know what? You shouldn't have to do that, even if your parents are paying for it. You can stay here. I have a bed and everything you could ever need."

The voice started to argue, but Cass cut them off. "Don't worry about him. I'm sure he'll be just fine with it." She paused as Hiro stepped through the entrance with Baymax in tow. "Look, he just walked through the door. I'll ask him." Ignoring their protests, she covered the mouthpiece with her hand. "Hiro! How was school?"

"Fine," he mumbled.

"Hiro was successful in letting a small prototype robot run around the Robotics Lab, disrupting other projects in his vicinity," Baymax said, raising a finger. "Professor Granville was not pleased."

"Thanks a lot for the play-by-play, Baymax," Hiro said dryly.

"Hiro, I need to ask you something," Cass interjected. "One of your friends needs a place to stay for a couple days. Their house is getting renovated and they don't feel comfortable going to a hotel. You don't mind, do you?"

Hiro gave her an odd look. "No, I don't mind. But it's kind of weird." He glanced down at his phone. "I see them everyday; why wouldn't they just ask me at school?"

"Maybe they thought you would say no."

"They're my friends, Aunt Cass. I wouldn't say no."

"Well, that is very reassuring to hear." She waved him off. "I'll have dinner ready in a little bit. Go wash up."

As Hiro made the trek upstairs, Cass uncovered the mouthpiece, reverting her attention back to the caller. "See? I just asked him and he's OK with it. Bring all of your stuff by after you speak to the builders tomorrow and I'll get you set up. I'll even make you breakfast. What do you normally have in the morning?"

The person started listing off a comically large list of things, which Cass could only chuckle at. Once they were done, she spoke up as she flipped the sign on the door to Closed. "Tell you what, sweetie. I don't know half the words of what you said, but I do know eggs. I'll whip up something nice before you head out for the day. What time do you normally get home?"

She nodded at the response. "OK. I'll give you a spare key just in case you stay late for anything. But I'm keeping you up, aren't I? We'll talk more once you get here tomorrow."

The voice was very appreciative, but Cass shook her head. "It's not a problem at all, sweetie. The only thing you have to worry about is Hiro, and he'll be fine with it once I explain everything to him. Besides, you two are friends, right? What's the worst that could happen?"

The answer made her slightly recoil.

"OK, that is definitely bad, but remember: murder is illegal in the state of California. And I would react very badly if I suddenly found myself without a nephew."

Silence came over the line.

"That was a joke, sweetie. Fred doesn't say any funny things to you at school?"

More silence.

"Well, he does try his best." Cass walked over to the cradle of the phone. "In any case, get some rest. I'll see you tomorrow."

The voice said their goodbyes, followed by the elder Hamada's name. She smirked a tiny bit before responding.

"No need for being formal. It's Aunt Cass. I'm requiring you to say that during your stay here. Have a good night."

Cass hung up the phone and strode over to her bookshelf. Luckily, due to her adventurous nature when it came to food, she had collected an eclectic variety of cuisine cookbooks from all corners of the globe. Her finger brushed over the spines as she tried to find what she was looking for.

"P...P...P...Ahh, here we go."

The large red book was now in her hands as she started to leaf through it. She stopped at a page near the middle, taking note of all of the different ingredients she would need for that particular dish.

"Well, no better time than the present to learn, right?"

Cass tucked the book underneath her arm and patted it.

"I just hope she likes it."

AUTHOR'S NOTE: I am going to give everyone who reads this story five guesses as to who the mysterious caller is, and the first four don't count. :)

This is the prologue to Overnight, a story that has been at least partially written since I first started doing Big Hero 6 fanfiction. It is merely the next step in what is going to happen in terms of the Hiro/Karmi relationship.

It will be an escalation from what happened in Foundation, and it will be chock full of so man big (and little) Hiro/Karmi moments that your teeth will literally rot from reading it. It'll start off a little slow, as most of my stories do, but it's like a roller coaster. You gotta climb the hill before you get to the drop at the top.

I've said this multiple times both in my older stories and on DeviantArt, but it bears repeating: I am very excited to get to share this story with you guys. I hope that I'm not overhyping it, but I legitimately think I'm at the right level of hype.

The only issue is that the arc finale may air during the events of this story, which may mess some things up depending on what happens. But knowing myself...I'll probably just ignore it anyway. This will take place a little bit after Fathom and Companion, and not necessarily after the finale. But we'll see.

So strap yourselves in, keep your hands inside the ride at all times...and let's start climbing. Chapter 1, "Hello Darkness...", is next week.

Read and review, if you like. Until next time, everyone.