- Male protagonist Jiang Yu (including "y"): He is a "problem student" in the eyes of the teacher. He gets into fights and misses classes. He only restrains his temper in front of Chen Zhi. There are orange candy wrappers from her hidden in the textbook (she always says that he smells like cigarettes).
- The heroine Chen Zhi: The "good girl" who is number one in the grade. Her mother is the principal. She has been planned to lead a life of "key high school → 985 → foreign company executive" since she was a child. The side pocket of her schoolbag always contains medicine to treat stomach cramps (Jiang Yu found out that she was sick when she was in the second grade of junior high school and went to buy medicine in the rain and broke her arm).
- Roots of BE: class differences + family oppression + youthful stubbornness, like two intersecting railroad tracks, eventually leading to different distances
Concept: adapted from a true story