a/n: Inspired by and based on Vocaloid video of the same title. Listened to the Utada Hikaru version while writing this.

KOKORO

But something was missing, there was one thing he couldn't do, and that was the program called a "heart"
(Kokoro, Vocaloid Original Song)

He stood back in anticipation as a familiar sound began to fill up the once silent room. It came first as a whirring sound, like every other piece of machinery that he's worked with, but it didn't take long for the sound to die off into a soft humming. He remained in the same spot and watched as a pair of viridian eyes stared back at him. Ones he thought he'd never live to see again.

"Do you know who I am?"

He seemed to have held his breath as he waited for her to answer. Like always, he was mesmerized—mesmerized by her eyes that were observing him. Something that's she's always done then and now: observing him.

The whirring noise from earlier came back briefly.

"You are Doctor Uchiha."

It wasn't until he heard her voice and her words, when he was faced with reality. Upon being reminded of the truth, his onyx eyes grew cold. Any bit of emotion he had shown earlier (the anticipation, excitement and longing), completely gone. He was void of emotion, just like her voice. He focused his eyes on his clipboard—he couldn't look at her eyes.

"Are there any problems with the system?"

"Everything is functioning properly."

The man nodded somewhat stiffly as he checked off something from his clipboard, trying to get used to her voice. How he wished it was the same vibrant, cheerful voice that she had. He shook his head, deciding to focus on his current task.

"Do you know your name?"

"Sakura."

"What do you think a heart is?"

That was a question that the Doctor decided to ask her one day. He usually does so every now and then, talk about things that were strange to her.

"If you are asking about the organ, a heart is a multi-chambered organ that helps pumps blood through the human body," she answered in her usual textbook-answer form, "In my case, although I have a similar organ in my body, it does not function in the same way since I—"

"Sakura, what do you think a heart is?"

She simply stared back at the man; for him to repeat a question meant that there was a much deeper answer that he wanted... one that she probably couldn't provide.

"If you would like me to run a search Doctor, I can do that."

There was a moment of silence before he sighed and went back to his work.

"It's okay. Leave it."

Today was the first time they have someone visiting the lab. She stared back at the guest who kept glaring at her since he first saw her.

"Sakura, please go get us some tea."

It wasn't long after she left the room to get tea for Doctor Uchiha and his blond haired guest when there were sounds of things crashing to the ground filling the facility followed by an yell from the visitor.

"YOU BASTARD!"

There came an unfamiliar sound of someone's fist punching another's face, but she recognized the sound since it was programmed into her.

"Damn it! How could you do this? How could you do this to her?!"

There was a long pause. Perhaps now was an appropriate time to bring in the tea.

"Idiot, what do you know?"

"That you've gone completely insane Bastard. You're only going to hurt yourself in the end."

The guest didn't leave too long after that, and on his way out, he stared at her. It was no longer a glare, but there was something with the way he looked at her that perplexed her. She wasn't able to decipher the meaning; she may have to ask to get an update on that next time.

That day, both cups of tea remained untouched, and no one has ever come to visit since.

He was always working on that same program.

"Is that a new system update?"

He seemed to be contemplating on an answer. Sometimes he would have an answer for her questions right away, and other times he would always look contemplative (she was able to get that update she requested from the time when the visitor was here) as if searching for the right words, or just debating on whether he wanted to answer her or not.

"It's a new program for you, but right now your body can't handle it."

"If you are concerned about the memories, it's already been backed—"

"No!" It was the first time she saw him reacting like that. And it was also her first time flinching, a reaction that showed surprise.

"Doctor?" Her voice had snapped him out of his thoughts.

"Sorry. I wasn't in a good mood." She nodded, and there was silence between them before he spoke again.

"Sakura."

"Yes?"

"I don't ever want you touching this alright?"

He always spoke to her firmly. But this time, there was something about his tone. She couldn't recognize what it meant, she just knew it was different, but she decided not to inquire any further. As always, she nodded back at him.

"I understand."

"I don't ever want you touching this alright?"

Despite it being forbidden, she still found herself staring at the file.

It's been a hundred years since Doctor Uchiha last spoke to her.

He once told her that humans had limited life spans, and they were always looking for different ways to prolong their life. She was one the results of such desires. Had it been something that he desired for himself? He never answered her. Even if he did, Death had already caught up with him a hundred years ago.

There would be no one else to complete his research… no one's ever been here since the first visitor came. No one will know of this project that he's worked on, even before she woke for the first time. Someone has to complete his research. She was the only one.

"Command," her voice was clear as it echoed in the empty lab, "Download file: KOKORO."

Memories. They were her memories.

"I love you with all my heart!"

She… felt it. There was something wrong with her chest cavity.

"Sakura… thank you."

Something inside of her… burning, filling, spreading, expanding—there was something awakening inside of her. Memories. Emotions. Feelings. Sakura placed her hand over where her "heart" was; although it wasn't pumping blood through her mechanical body, it was beating as a result of the program. She was able to feel joy and happiness, and at the same time she felt grief, pain, and anguish.

He warned her already, and he was right. Her body can't handle all these things and she was breaking. This wasn't something a simple memory back-up could fix. No wonder he had urged her with such desperation (yes, she knew now that it was desperation in his warning back then) not to touch the file.

Her tears just wouldn't stop. She shouldn't be capable of crying, yet there were tears that kept coming.

"Sasuke-kun…"

/ It was an unending cycle… of tears and pain /

"Wow! I can't believe there'd be a research facility in such good condition down here of all places. Whoever's it was, they've done a great job at hiding this. It must be several hundred years old! You think we'll find anyone in here?"

"Are you looking for a corpse?" Came a sarcastic reply from his partner, "Just shut up and get some light in this place Idiot."

"Tch. Bastard."

He had moved his hands along the wall, looking for a switch or anything. His companion had found it first, and gave him a warning before switching it on. Light flooded in his dark-colored eyes, and the first thing he saw upon adjusting to the brightness was pink.

"Whoa! You've gotta watch out for what you say. I almost thought it was really a corpse for a second…"

Of course it couldn't have been a corpse. They knew this place was sealed shut, any corpse found in here would have been decayed beyond recognition. It had to be a robot or cyborg of some kind. They were forbidden, but that didn't stop people from creating them in secret.

The blond-haired man moved closer, but he didn't move a single step from his spot.

"Heh… well, it looks like they were pretty advanced even back then." The blond noted as he reached a hand out to touch the pink locks, and the skin of her forehead. He'd imagine that it was cool to the touch, but probably felt real at the same time.

"This must be the most advanced piece of work that still hasn't been destroyed. Sucks that the Council's full of superstitious and traditional old crones—forbidding advanced technology and such… imagine how much improvements it'd make on this messed up country! Hey—"

The words died from his mouth as he gaped, shocked at what he was seeing.

"Oi, Sasuke." He called out, dropping the usually preferred nickname, "Are you okay?"

"What are you talking about?"

Naruto stood up from his crouched position and faced his friend, a look of concern on his face.

"Are you crying?"

The dark-haired man frowned, slightly offended by that comment, "What the hell are you ta—"

"Ne, Sasuke-kun?"

And he felt it.

He brought his hand up to his face, the back of his hand touching his wet cheek. There were tears. His tears.

"We'll be together forever right?"

"Hn."

"Hey," There was hint of panic in his friend's voice, "Sasuke, did something—"

"Shut up Naruto." He almost barked, a hint of desperation in his voice. He willed himself to calm down, and refused to panic like his friend was doing so right now. His eyes were still on the pink-haired sleeping figure before them, "Let me think for a bit."

"You know… a simple 'yes' would've been nice."

"Don't be annoying."

She huffed as she turned away from him. Seeing her response, his shoulders slacked a little as he sighed.

"Sakura."

"What do you want?"

"I love you."

"E-eh?"

"I wonder if she has a name. Not the model names, but you know… a name-name?"

"Could you say that again? I didn't hear you clearly the first time."

"Sakura."

"Huh?" The blond blinked before turning towards the sleeping doll, his eyes narrowed, trying to see if her name was written anywhere on her, "Is it the hair?"

"Her name, Sakura."

"You know, you'd be more popular with the ladies if you would get the stick out of your..."

He didn't complete his sentence. Something about his friend's expression, when looking at her, was just so perplexing. In all his years of knowing him since childhood, the blond has never seen him so full of… emotion. Not like this. Naruto turned back towards the doll, to the one whom Sasuke called Sakura.

"Hey… do you think we can ever fix her? You know, get her to move again or something. We'll probably have to do it in secret though so those old crones won't—"

"Too late, maybe another time."

"I'll do whatever it takes. I will fix her."

"I love you too Sasuke-kun."

Were these his own memories, or that of a dream? That of a time far far away.

a/n: Hello! So I know the plot might be confusing and there are a lot of empty spaces, and background stuff for this AU-story, but as I was trying to figure it out myself, I decided it was best left like this. And do watch the video for Kokoro if you haven't—and listen to the Utada Hikaru version (someone made the song using a custom voice bank for her voice) it's hauntingly beautiful and was what inspired me to write this.

If I ever continue! I may write this from another POV (first part was Sasuke's, then Sakura's and then Sasuke again, so maybe attempt at Sakura, Sasuke and Naruto's for the same scenes). Thank you for reading!