Yes. Kokoro. FREAKING KOKORO. If your just here to support me and have no idea why its sad, PULL UP THAT VIDEO AND WATCH IT RIGHT NOW!
____________________________

-Len's POV-

I was typing at the computer faster than I have typed anything in my life. I have worked on this project for years, and it's finally getting a chance to see the wide open! The sprout of a cherry blossom tree was sitting by the table. My laptop was plugged into a larger device in front of me. A robot. She had blonde hair and looked quite similar to me. I hit the ENTER button in anticipation. The robot opened her eyes. "LOADING. 20%. 35%. 41%. 68%. 72%. 99%. LOADING COMPLETE." Her blue eyes opened. I smiled brightly. "I DID IT! I CREATED ARTIFICIAL LIFE!" I didn't get a response. "I'm Kagamine Len. Your name is Kagamine Rin! Welcome to the world." I held out my hand for her to shake, smiling giddily. No response. I opened my eyes in slight confusion. That's when I saw the blank slate look on her face. "... oh." Suddenly it felt lonelier than ever. Mom... Dad... did you know this would happen?

-SHORT TIMESKIP BROUGHT TO YOU BY THE FEELS-

We stood outside the cherry blossom tree. Eventually, it had to be planted outside. "Alright! Rin, this is your first singing lesson." I still haven't gotten her to properly smile. "As you wish, master. What are my orders?" I cringed internally. I don't want to be her master. I don't want her to be under my class in any way. I handed her a piece of sheet music. "Repeat after me, alright?" She nodded in response. Then I started to sing. It wasn't anything I was super proud of. I was actually super self-conscious. And then I heard HER sing. She was getting the notes and words, but... she isn't capturing the beauty of the song. "Um... lets try something else!" The next one burned with flaming intensity. Same problem. That was when I realized. Oh, of course! She is a robot. What she needs is a heart. "I don't understand." She said. "I sang the notes correctly. Why are you dissatisfied?" I looked back over to her. "I'm not dissatisfied. I just need to do some more work."

......................................
"Len, dear? We have to have a talk." Mom and Da- er, Meiko and Kaito, were standing in front of me. We were in front of a church. We weren't religious. Why were we in front of a church? Kaito spoke to me in a hushed voice. "We simply don't have enough resources the care for three people, Len. I'm so sorry." What? What does he mean? I'm confused. "Len, just wait here. Someone will get you." I watched as they both left. What they said made some sense. So why am I crying? They aren't even my real parents.
..................................

I felt something grab at my lab coat. "GAH?!" I turned around in surprise. It was Rin, who came to ask me a question. Her eyes... they are reflective. Almost like glass. No emotions. I don't want that for you. She asked me a question. The same question she would ask years later. When I knew my time was almost up. When I knew I had to leave her. I only smiled at her, and went to the cherry blossom tree to rest at last, but her eyes held the same question. "Master... why are you crying?"

- LONG TIMESKIP BROUGHT TO YOU BY LEN'S TRAGIC BACKSTORY -

-Rin's POV-

My name is Kagamine Rin. My designated age is 14, but I was brought to life 100 years ago. I state facts when I am bored. I am always bored. I used to sing with Master, but Master disappeared. What happened to him? I do not know. The world has color. I can not see color. I can determine color by the shades of gray I see. I don't know if I have color. I am different. There was more in store for me. I don't know what it was. I often walk outside to the cherry blossom tree. Cherry blossoms are pink, but leaves are not. Leaves are green. I am walking to that tree now. Master seemed so happy. Except when he wasn't. But he was mostly happy. Why did Master work so hard? Where did he go? Why did he spend so much time on my future? I do not know. The computer behind me turns on. It is..... what on earth? Is that color? The screen has words in white. "FILE CREATED. PLEASE CONNECT 02 TO THE COMPUTER AND PRESS ENTER." ... huh. Did Master go into the computer? Did Master defy physics? I walked into the laboratory. I connected myself to the cords and hit ENTER. Programming flooded through my body. Lots of it. I was embedding the numbers into- WARNING. WARNING. 02 CODING UNSTABLE. COMMENCING SHUTDOWN.

- ANOTHER timeskip brought to you by me having no idea how to control an emotionless robot-

LOADING 02. 12%. 30%. 48%. 52%. 66%. 74%. 81%. 99%. ERROR: FILE NOT LOADED. DOWNLOADING FILE: K.O.K.O.R.O.

"...... huh?" I woke up much different than I was before. "What's going on? What is this file? I'm confused." I feel unusually heavy. I looked around. "Master? What is this file?" Then I remembered. Master disappeared at least 30 years ago. Wait... tears? Am I crying? I think master used to cry. Something sad he always remembered. And he looked at me with such sadness in his eyes. Wait. I'm shaking. Am I... scared? Sad? I HAVE EMOTION? Master always talked about something to himself. "Kokoro, most often known as 'heart', is a thing all humans have. We need it to survive, and it circulates blood through the body. Some believe that the heart gives people emotion." I repeated to myself. "So... is this a heart?" It was nothing short of a miracle. I looked outside to the cherry blossom tree. OH MY GOD! Its not some shade of grey! It reminds me of the computer screen. I was concerned. I didn't even freak out. Why didn't I? Oh yeah, I just got a heart. "Some people say that, whats the word, love? Gives you color to your life... huh." So, the grass is green, like the color of the computer screen. There is something else. What color is that? I don't know. But for the first time since a while ago, I really WANT to know!

I ran up to the tree in excitement. Whenever master was happy, he was so expressive. He would fling his arms wide with joy. I found myself doing the same thing.

I finally noticed what was that weird color on the floor. "Flowers! They are so pretty!" I began to pick the flowers. Maybe I could ask someone? No, they would think I'm weird. Maybe I can find Master! He would know! As i was picking the flowers, I saw something else. Bones. If you traced the bones, they formed a hand. This is a tree by a probably abandoned laboratory! Why are there BONES outside? That's when I realized. The day before master disappeared, he was sitting by that tree. I asked him a question. "Master? Why are you crying?" No.... no, he didn't. He couldn't have? He didn't DIE, did he?! I remembered my reaction. All I did was stared at the tree. I stared at the tree with a blank expression on my face! But I think I know why he made me. Why he tried to give me this heart. All along... Master just wanted a friend. Oh, now I'm doing it again. I'm crying and trembling. But I couldn't stop myself. I just wondered where he was, and all along, he was dead! I could faintly feel it under my skin. INITIATING: K.O.K.O.R.O. EMERGENCY PROTOCOL. But it was impossible to hear under my scream. "NOOOOOOOOOOOOOOOOOOOOOO!"

-BACK WHEN LEN WAS ABOUT TO DIE-

-Len's POV-

My life has not been the best, I can say that, but it had some great points. And even some miracles. The first miracle was that I created life. That I created YOU, Rin. The second miracle was all the time we spent together. Me teaching you about life and love and music. The third miracle... hmm, what WOULD the third miracle be? I closed my eyes, remembering my youth. I suddenly heard a faint scream. "NOOOOOOOOOOOOOOOOOOOOOO!" My eyes burst open. What in the world?! It was a portal, A PORTAL!, in front of me, and there was Rin. She saw me, and I saw her. "DONT GO!" She continued. I saw her eyes. The eyes that were once glass. Emotion. SHE HAS EMOTION! The third miracle has not happened yet. It happened so fast. My body was exhausted, but my spirit was faster than lightning. It leaped straight for Rin, holding her tight in a hug. I became the spirit. And that spirit was my younger self.

-Rin's POV-

"Uuuuuuuuuugh..." I'm so dizzy. What was that in the tree just now? A portal? And did someone just hug me? I began to pull myself up a bit, when I was hugged again. "ITS A MIRACLE! YOU HAVE A HEART!" ... did I know this person? He seems familiar. He let go of the hug and reached out to shake my hand. "My name is Kagamine Len. Welcome to the world... Rin." That's when I realized. Master... its you! A while back, I would have just made a mental note of it and stared. But this time, I held a wide smile.

We had so much fun together! We climbed a tree (although mostly I was the one who wanted to do it.), and Len almost fell out of it! We picked flowers, and I made him a whole crown of them. And we sang together. Then I remembered. Love. A very vague word when you think about it. It is used in a variety of contexts. If you enjoy an activity, you love it. It can also be said about an object or time, like the sunset. But most often, it is an undying passion for another person. It can also be used for a family member. I wonder... if THIS is love. We relaxed by the tree. A sunset was there right at that time. Len never took off the flower crown. We both smiled.

His life ended.

He gave her the inheritance of solitude.

And, he entrusted her the key to the Miracle.

But the Miracle only lasted for a moment.

The "Kokoro" was far too big for her

Unable to withstand that weight,

The machine shorted and was never to move again.

However, her face was filled with a smile.

She looked like an angel.