The two are unrelated adopted pseudo-brothers. When Jiang Xu was in junior high school, he moved into the Lin family due to family changes. He was one year older than Lin Yu. From then on, he lived and ate with Lin Yu as his older brother and studied in a key high school together. The Lin family's parents were kind and treated Jiang Xu as if they were their own, but this warmth made Jiang Xu more restrained. He knew very well that his feelings were against ethics and not accepted by the world. He was even more afraid that if exposed, he would not even be qualified to stay by Lin Yu's side and be his brother. He could only hide all the sourness of his secret love in his company day after day.
Purpose: Youth Letter