During the summer vacation after graduating from junior high school, 16-year-old Wu Ning stayed at home using voice dating software. As fate would have it, Wu Ning, who had just started to fall in love, met Ouyang Xiao. Wu Ning was deeply attracted by Ouyang Xiao's dazzling light. At the same time, Ouyang Xiao was also attracted by the simplicity of Ouyang Xiao. Wu Ning was impressed by the blank sheet of paper. Ouyang Xiao, who was accustomed to a life of cynicism and intrigue, decided that Wu Ning was the person he was looking for in this life. The God of Love quietly touched the heartstrings of the two at this moment, and the two came together naturally. She is willing to love only this "old man" who makes her unable to extricate herself for the rest of her life, regardless of many obstacles such as Ouyang Xiao being six years older than her and the gap between their family backgrounds. Ouyang Xiao is also willing to end his twenty-two years of uninhibited life for her and develop wholeheartedly, just so that their future can break through the shackles of reality and have more possibilities.
As Wu Ning began to live in high school, Ouyang Xiao also went abroad to study, and what was once a long-distance relationship turned into a transnational relationship. Wu Ning was gradually overwhelmed by the pressure from all aspects. She chose to end the relationship. Even though she still loved him deeply, she gritted her teeth and persisted, completely ignoring Ouyang Xiao who begged and even collapsed. She was scared and tired. She was only sixteen years old, how could she bear such a burden.
Ouyang Xiao, who begged to no avail, had no choice but to give her the most important promise in his life: "Three years of high school and four years of college, a total of seven years, I am willing to wait for you to change your mind." Ouyang Xiao secretly made up his mind that even if Wu Ning stopped coming to him in these seven years, he would still pursue Wu Ning again...