Under the old camphor tree in Qingxi Lane, twelve-year-old Lin Wei bumped into eighteen-year-old Jiang Che for the first time - he was the proud son of heaven in the eyes of his neighbors, and the little sun that had been hidden in her notebook for many years. In order to catch up with that dazzling light, she followed his path and was admitted to a key high school, engraving the promise of "going to Shanghai to meet him" into every late night while preparing for the exam in the third grade of junior high school. Jiang Che's review materials, the collection of wrong questions sent across the city, and the encouragement in the video became her armor against stress. From the snowy night in Qingxi Lane to the starlight on the Bund in Shanghai, from looking up cautiously to the promise of firmly running for it, Lin Wei spent his entire youth proving that secret love is never a one-man show, but a journey of following the light and becoming the light. This is a story about waiting and growth, written for everyone who has tried their best for someone and finally lived their own light.