Natasha's older sister was named Yuna.
Yuna's muscular atrophy had been discovered five years ago. After undergoing treatment for some time, she saw no improvement. Eventually, the exorbitant medical expenses crushed the family, which had never been well-off to begin with.
Although the sisters' parents were still alive, they were farmers living in a remote area. All they knew was that their two daughters had found respectable jobs in the big city. They had no idea about Yuna's illness.
Yuna was a dancer. She had once had many opportunities to perform on prestigious stages and was fairly well-known in her circle.
At that time, Natasha had only just graduated from university and entered a company to work, while Yuna had already relied on her own efforts to buy a house of her own in the city.
They had originally planned to work hard for another year or two and bring their parents over once they had saved more money—but everything plunged into despair because of Yuna's illness.
Although Natasha later achieved some success at work, every month she had to pay Yuna's medical expenses as well as send living expenses to their parents back home. Thus, although her job looked respectable, Natasha actually lived under considerable financial strain each month.
Because of this, Yuna simply sold the house as well, and the sisters moved to Chinatown, where the rent was relatively cheap.
Their lives gradually stabilized. Aside from being unable to walk normally, Yuna had grown used to seeing the world from a viewpoint half as high as before, and to having to tilt her head back to speak with others.
She had also grown used to spending far more time sitting than standing.
She had also grown used to no longer thinking about the stage.
Actually, Yuna did not