He Jian and I were originally in the same university, but in different classes. They were two people who had nothing to do with each other, but God played a joke on them. The key suddenly transferred to the biology class, which happened to be my class, and what happened was that he was sitting behind me. From hating each other at the beginning to gradually understanding each other, the love between the two appeared at different times, due to a combination of circumstances, you chase me, and God's will...