My first Astro Boy fan fiction. The story is about Astro met his twin sister (or Toby's twin sister), Teresa. She is a robot like Astro, and was powered by the positive energy – the Yellow Core. Astro decided to find more about his past (or Toby's past) with the help of his father, Dr. Tenma. Meanwhile, President Stone escaped from jail and he wanted to get the blue core and the yellow core. Astro and Science (former name is Teresa) must save Metro City and learn the secret between their core.

Please enjoy it!


Chapter 1: Twin Sister?

Since that battle, the people and the robots had cleaned the surface and now it is very beautiful. Astro is now a real hero. He was reunited with Dr. Tenma, and Cora made up with her parents. Zane, Widget and Sludge had a family. Everything is back to normal, until now...

Astro and his friends were looking around the beautiful scene of the surface.

"It is beautiful.", Cora said.

"Yeah, it is.", Astro agreed.

Suddenly, a yellow light shined in the forest.

"What's that?", Zane asked.

"I don't know, but I have to check it out. You guys stay here.", Astro said and flew into the forest. He followed the light.

Finally, he saw a girl. She brought the plant back to life. The yellow light was around the plant.

"Hello?", Astro began.

The girl turned back her head. Her right hand transformed into an arm cannon and she was pointing the arm cannon right in front of Astro.

Astro was shocked to see her. Because she looks like him!

Suddenly, her eyes went wide. "Toby? Is that you?", she began.

"Err, excuse me. My name isn't Toby anymore, my name is Astro.", Astro answered.

"You must be a replacement of Toby Tenma. Your father is...Dr. Tenma?", the girl asked.

"Err...yes.", Astro answered.

"I'm right! It is you!", the girl shouted.

"Err, excuse me. If you know me, but...why I didn't know you?", Astro questioned.

"Your father didn't tell you about me. I'm your twin sister, err...I mean, Toby's twin sister, Teresa.", the girl said.

"Twin...sister?", Astro was very confused.

"I think you better ask your father about this. I will find you then. Bye!", Teresa said and rocketed off.

Astro just stood there. He was shocked.

Does Toby really had a twin sister? He thought.


OK. This is just the beginning.

Don't miss chapter 2! Bye!