A person sitting in a quiet bookstore, holding a book, but looking out of the window, suddenly, a drop of two drops of three drops of rain fell on the window, rain, not big, but the pedestrians all put up umbrellas, looking at this scene can not help but fall into memories, with a touch of sorrow and sadness. This song is quiet and soothing, and the mood is worried. It is suitable for use in such scenes as film and television dramas, APP, audio novels, radio stations, games, cafes and so on.