One day, Xiaoqing met a stray puppy. Seeing that it was really lovable, she adopted it. At mother's suggestion, Xiaoqing named the puppy "socks" because one of its front paws is white, just like wearing socks, and made ten agreements with it. My mother fell ill in hospital and died of cancer soon. My father became a famous doctor, and his work became busier and busier. Only socks accompanied Xiaoqing.
Xiaoqing has a good friend named Xingjin at school. His dream is to become a classical guitarist. Because her father transferred her job, Xiaoqing moved to Sapporo. Before finding a new home, she could only live in a dormitory, where no pets could be kept. Xiaoqing had to foster her socks in Xingjin's home. Dad came home later and later, which made Xiaoqing feel lonely. Xingjin is going to study abroad. On the day of departure, her father failed to see him off as scheduled because of an emergency patient. Xiaoqing was very angry. On the city consciously owe his daughter too much, but also dissatisfied with the hospital's policy, he resolutely resigned and returned to Hakodate to open a small clinic, and socks also returned to Mingli. A few years later, 22-year-old Xiaoqing was studying in the veterinary department of the university, and her socks had already grown into a beautiful golden retriever. Xing Jin went back to China and reunited with Xiao Qing, and they became lovers.
Xiaoqing wanted to work in Xushan Zoo after graduation. Her busy life made her too busy to take care of her socks, but when she needed help, socks came to help as before. Xiaoqing remembered one of the ten agreements: "I can only live for about ten years, so please try to stay with me." Ten years have passed since I first met Sox ...
Finally, death has come. What will happen to the dog, and what will happen to Xiaoqing?