Heart Sonata (Vocaloid Oneshot Collection) [Requests are open]

The Yandere Twin Brother

Type: Vocaloid x Genderbend (Yandere )

Pairing: IO x IA

Second yandere. Hope this won't end up like crap. ENJOY!!!

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"IO, please date me!" A girl squealed.

"No IO me!" Another shouted.

I walked in the school halls. A bunch of girls followed me. All of them were fangirling and asking me to date them. Even the most popular girl in Vocaloid high, Hatsune Miku, asked me out.

But I had no interest in those girls. They are all worthless to me. Except.....

"Onii-chan!" A beautiful girl with pale pink hair tied with two  side braids came to me. The only important woman in my life and the one that I love.....

"IA." I said. Yes, I am in love with my own twin  sister.I know it's a sin but I love her. I need her. And I would kill anyone who tries to touch her. I am her yandere twin brother.

As we walked home, I noticed she was happy. Happier than the other days.

"You look happy today. What's up?" I said. She smiled.

"Oh onii! I'm so happy!!!! Len asked me out!!!" She was squealing. Len Kagamine, one of the best singers in Vocaloid high. Along with Gakupo, Kaito and me. Because of our  good looks and talent in singing, we were called "The Princes of Songs".  Len was my best friend. He was. And now, I kill him.

Its late at night. IA is now sleeping. I  opened my drawer. Inside it were pictures of IA. Some had pictures of her being with other guys. I crossed their heads with my red marker.

I pushed away the pictures and got my favorite knife then stuffed it in my bag. I looked at IA's picture again.

You will be mine. IA.

I locked my drawer and went out the house.

I was at Len's house. I snuck inside quietly. I was at Len's room. I turned the doorknob. It was unlock.

That baka, this is easier than I thought.

I got in his room and saw him sleeping. He had pictures of IA in his room. It made me angrier.

I got my knife and took one last look at his innocent face .

Sweet dreams, Len.

The next day....

As I entered the school,  I heard students crying. Even IA. I was curious.

"WHO WOULD DO SUCH THING?!!!!" I heard Gakupo shout. I went to him and Kaito. They were comforting IA. I got jealous.

"Hey. What's up?" I asked.

"Len..." IA cried. "Someone m-murdered him..."

So they already knew Len's death huh?

"Did they find the killer?" I asked just to make sure.

"No. They're still investigating." Kaito answered.

"Our date was today..." IA cried harder. I went to her and comforted her.

Later....

I was in the boy's restroom with Gakupo. He wanted to tell me something.

"What is it, Gakupo?"

"Um... I kinda like your sister." He said. I got jealous . I held my knife behind my back.

"And?"

"I wanna date her. Is it ok with you?" I smiled. I got my knife and walked towards him. He got scared.

"IO, What are you doing?" Gakupo asked. He is stepping back.

"There is something you should know, Gakupo." I said.  He was shaking.

"IO?" He is at the wall. He can't escape. I raised my knife.

IA is mine.

I stabbed him a lot of times and hid his body in an empty room in the school. Nobody went there so I'm sure no one will find him.

IA is mine alone. What if Kaito likes her? I guess I'll just have to kill him too.

I invited Kaito to our house. He walked home with me and IA. He was flirting with IA the whole time.

I knew it.

When we got to our house, I called Kaito to my room.

"What do you want, IO?" He asked. My knife is in my pocket.

"You like IA don't you?"

"What?" He said playing dumb.

"Don't lie, Kaito. "

"Im not!" I got my knife. I cornered him.

"She's mine! You can't take her away from me!" I said and started stabbing him until everything I saw was red.

"Onii-chan-" IA came in. She saw Kaito's corpse. She looked at me, full of blood. Shit.

"What did you do?!" She asked. Tears rolled down from her cheeks. She went to Kaito's dead, bloody body.

"Kaito..." She faced me. "Did you kill him?"

"Yes IA. I killed him. I killed the three of them. I killed Len and Gakupo." I walked to her. She stepped back.

"But why?!?!?!" She asked. She was crying.

"Because you're mine IA. " I still held my knife. "And now, no one will steal you away from me." I pulled to a kiss.

"No!!!!" She got away but I pulled her again and placed the knife near her neck. She was shaking. I licked her neck.

"Be a good girl ok?" I said and kissed her at the lips. She did not refuse. I smirked.

Now let's have some fun.

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Woohoo!!! Finally done!!! Thanks Seekernest for requesting. And if you think it's crap, just tell me and I'll make it better. Bye!^^