When Su Nian was interning at the age of 22, on her way to 8 a. M. In the morning, she bumped into the person who had been with her her whole life, a high school student who was full of youth and vitality. She never expected what would happen next with this 18-year-old boy. The relationship between brother and sister, from the beginning there was a psychological difference in age, to the end it gradually became a warning.
