Childhood sweethearts Chang Yuan and Zhu Yan have been together from kindergarten to the third year of high school. The wisteria flower stand bears witness to their secret love. The rational and restrained academic Chang Yuan repeatedly gave up shortcuts to protect Zhu Yan and wrote on the application form, "Priority is given to living in the same city with Zhu Yan"; the emotional and delicate Zhu Yan responded to his unspoken love with handmade gifts and picture books. After the college entrance examination, the coming-of-age confession under the wisteria flowers opens the chapter of long-distance love. Hidden in the wind and snow in Beijing is the tenderness of the laboratory key and the wisteria flower necklace. During the graduation trip, the Cambridge PhD offer and the two-person air ticket to Edinburgh appeared at the same time. After three years of staying in a foreign country, the proposal in the rain in Cambridge finally came to a successful conclusion. From building blocks at the age of six to a diamond ring at the age of 28, their love is like a wisteria that never fades, becoming stronger and more splendid in separation and reunion.