Yu Hua and Gu Jin have gone through countless ups and downs together from elementary school to graduation. They were supposed to make it to the end, but unfortunately, an unexpected accident made Gu Jin blind. In the days when she couldn't see, she began to become irritable. As for Yu Hua, he found countless ways to heal her eyes, but he still couldn't. In the end, he could not regain her sight. In the second year of her blindness, a large-scale blood-borne infectious disease broke out around the world. While looking for a treatment for Gu Jin, Yu Hua contracted the infectious disease. He made a decision, "Since I can't help you regain your sight, let me be your eyes."
Half a year later, Yu Hua and Gu Jin broke up. A year later, Gu Jin received a cornea donation and regained her sight. However, she learned from a friend that Yu Hua had passed away three months ago and received the last letter Yu Hua left for her...
Purpose: "As long as we are safe in the unpredictable future"