When she was sixteen, she met him when he was seventeen. In three years, they became an indispensable part of each other's hearts. As the college entrance examination approaches, her father's sudden death in a car accident lingers in her heart and her personality changes drastically. In order to fulfill the promise she made with her father, she was admitted to G University, and from then on she and him were inseparable, but she never thought she would lose him forever. After graduating from college, she went to work in the city where he went to college. She thought that one day she would wait for him to come back.