His favorite poem by Chen Menglei, a poet from the Qing Dynasty, is "Getting married and knowing you, and we will live together until we grow old." In the past ten years, she has never cut her hair short, just because of his words: "From now on, we will grow old together, and our love will last forever!" This is a poem he once wrote for her, and it is also the oath between him and her. Now, as time passes, everything in the world seems to have changed. The only thing that remains unchanged is her love for him. It was another rainy night. She walked to the window alone, and the raindrops hit the window sill. The past events also emerged from her mind bit by bit.