Wu Fei had a casual love affair in her senior year of high school. She didn't expect that Liu Yumo, a popular figure on campus whom she had never spoken to, had been secretly in love with her. They had a dull and unremarkable love like any other high school sweethearts. The weather during the summer vacation of the senior year of high school was always cloudy and rainy. Wu Fei remembers that they would always be lazy and watch movies in the room, or simply listen to music. The first song on Liu Yumo's playlist was always Arco's lead me into the dark, or follow me into the dark. Wu Fei can't remember clearly. The voice was low and desperate, and it was not out of the ordinary in that kind of weather. Wu Fei recalled Liu Yumo after many years, and always recalled those afternoons. Liu Yumo's handsome face had a little worry, and Arco's voice was playing. Wu Fei suddenly felt that the song was unlucky. She wanted to go back and turn off the music, to make the sky clear, to scold Liu Yumo, to take him out and make him angry. Wu Fei just didn't want Liu Yumo to die.