Husband and wife relationship. Liu Jun worked as a singer in a karaoke bar for more than a year, and then embarked on the journey of a wandering singer. He went all the way south, working during the day and singing at night. A 50-pound speaker and street lamp accompanied him late into the night. On the way, Liu Jun frequently contacted old friends and classmates and told them about his journey. One day, he met Sun Xuan, a junior high school classmate he had not contacted for a long time, in a group of classmates. Sun Xuan also liked music, had the same dreams, and the same hobbies. The two of them spoke more and more in common and became friends. For couples.