Zhang Xiao entered the most strict high school, met the two-dimensional Lao Bu, reunited with Xiao Jian, who had liked her for three years, and unexpectedly met him who seemed to be cool and warm. . . . The affectionate recitation of "The fewer people come back after thousands of miles, the smile still carries the fragrance of plum blossoms", which made her like mathematics and physics. She actually deeply liked the boy who accompanied him throughout high school. On a cool summer day, he would carry her to the infirmary. He would patiently teach her the topic and write "I have been waiting for you" on the paper.