Synopsis: Naruto has a sister and the Uchiha Massacre never happened. Yet danger still lurks about, and strangers who look like older versions of Naruto, Sasuke and Sakura appear.
Rating: M in the future
Pairings and Warnings: This will be Narusasu (both younger and older versions), so no, neither Sasukes or Narutos will end up with anyone else, even if younger Naruto and Sasuke are entirely clueless. So yaoi warning too.
Her parents named her 'Natsuko' so nobody would confuse her and her brother's names. They were twins, Naruto born seconds before her. They looked fairly similar, both of them with whisker marks, both blond and blue eyed, but Naruto held the Kyuubi within him, while Natsuko gained healing abilities. When they were young, the two of them could almost be confused for each other, but as they grew up, Natsuko grew to be a lovely young woman. Naruto had yet to grow fully, but Natsuko thought he would be quite tall and muscular.
Naruto chose to be a nin, as their parents had been. He knew of the attempted Uchiha massacre that some of the elders had planned, and vowed he would never allow such a thing when he was Hokage. Most people scoffed at such ideas.
Many people shunned Naruto because of the Kyuubi within him, but viewed Natsuko as an angel. She hated it, and went out of her way to avoid such people. Some people acted kind to both of them, like Iruka, but some of the opinions of the parents rubbed off onto the children. A lot of the children avoided Naruto when they could.
Natsuko knew that they weren't the brightest bunch, but what they lacked in knowledge, they gained through perseverance. Of course, having kind people like Uchiha Mikoto helped matter. But as for the other Uchihas…
Still, Natsuko always thought of Mikoto's sons as 'weird.' Itachi had been forced to spy on his family, but had exposed what the elders wished to do to the unhappy clan. This incident led to several changes in Konoha, one of which gave the Uchiha a bit more power so they didn't feel persecuted.
After this, Itachi quit being a nin, to the shock of most and dismay of some. He became, instead, a restaurant owner. His father didn't approve until Itachi proved that he had a different talent. He was a great businessman, and a lot of restaurants that pissed him off went under later.
As for Sasuke, he chose to become a nin in order to make sure that nobody else tried anything with his family. Natsuko thought that perhaps Sasuke had some power issues, but she didn't voice them, mostly for her brother's sake.
And Natsuko…she chose to work for Itachi. He was one of few that treated Naruto like a normal person.
Natsuko was proud of her brother. True, he had problems learning, but he never gave up. Despite people putting him down, he always showed them a smile. He loved to prank people, and Natsuko only admitted to helping him a few times. And he had a good heart.
The only real problem lay with Sasuke.
She liked him. Really she did. They would often talk. But when Naruto and Sasuke were together, the two pushed each other to the limit. In some ways, she thought this a good thing. The problem came when she had a sinking suspicion that Naruto loved Sasuke.
It wasn't that she wouldn't approve of Sasuke. She just didn't know if Sasuke could love Naruto. He never really indicated any preference for male or females, and really only reacted to the Uzumaki twins and his family.
But Natsuko hoped that he would love Naruto. She knew that they fought a lot, but cared for each other greatly.
Still, she was fairly happy with her life at the moment.
Yet everything changed the day she found two people unconscious, one that looked remarkably like Sasuke, and the other like Sakura.