Sakura's Twin Sister?

Sakura has a twin sister? The answer is yes though Sakura doesn't like her and neither do her parents. Noriko Haruno the girl everyone takes for granted and most of the time don't even notice. Her parents completely ignore her existence and Sakura hates her guts more than anyone trying to make the girls life a living hell every chance she gets. Still Sakura has never seen her cry nor did anyone else because she's never cried, not even as a child or a baby.. What happens when Noriko graduates amd ends up in Sakura's team? When someone has actually kept an eye on her? What happens on their first C rank mission? Read to find out!