When Shen Xingchen was five years old, he became an orphan. Adopted by his father's friend Uncle Luo. When he was ten years old, he went abroad alone.
The year Shen Xingchen went abroad, Luo Yin was five years old. Luo Yin had been waiting for thirteen years, and finally got her sister.
Come back. On the night of her eighteenth birthday, she knocked down the sister she had been thinking about for thirteen years!
Intention: None