You had a brother who was so overprotective, he always forbade you to go out with any man including your friend. One day you discovered the fact that your sister, whom you admire, was not your real sister. You were adopted by xiao family, because your parents had an accident and your parents were good friends of xiao's parents. And you start asking him about this truth, xiao was surprised he could only fall silent.

"Its that true? Am not your sister"