Li wan, a high school student, came home from school as usual when he caught a drunk father sending his autistic brother away. Because of miss, but also because of my brother's obsession with music, let my sister decided to record this long wait in the form of original songs. On the way to composing this song, she found that music can take her back to the time when she was a child and her brother was folding windmills. They also brought them back to the day when the drunken father reprimanded her sister and the brother came out to protect her. It was not until the end that she vaguely saw the familiar windmill that she realized that all the waiting was actually worth it.