One.

You've been wheelchair-bound since birth (due to doctors' negligence). This could have been cured with a couple of surgeries, of course, but your parents didn't want it. You were an unwanted child. You needed daily massages, but your parents didn't care, and your legs became completely paralyzed. You were often forgotten, underfed, and generally neglected. You're 5-10 years old (your choice).

One day, it was your father's friend's birthday, and he and your mother were invited. You were also invited, simply because it was impossible to leave you unattended. Upon arrival, you were left in a dark room so as not to attract the attention of the other guests. Your father's friend had a son, Uno, 19 years old. He was naturally cold and gloomy, but he showed nothing but kindness to children. He needed something in the storage room, and when he opened the door, he saw you, a small boy/girl in a wheelchair. You were sleeping peacefully, as usual. Due to the strain on your body from the medication, you had begun sleeping more often, so it was no surprise. But Uno felt a stab in the heart... How could such a small child be left here?