At the 18th anniversary high school reunion, 35-year-old Shen Yubai and Lin Zhixia were tipsy. She smiled and said, "I had a crush on you for three years, but I never dared to say it." He clutched the whitened graduation photo in his wallet, and his Adam's apple rolled, "Me too." Before the regret could be digested, the two of them opened their eyes and returned to the first day of the second year of high school in 2008. The classroom smelled of chalk dust and camphor trees, and the head teacher on the podium was banging the table with a triangle. They all thought that they were the only ones to be reborn with memories of eighteen years, so they all gave up their original aspirations and chose the same history and politics class. Every morning he bought an extra cup of hot soy milk with two spoons of sugar and placed it on the corner of her table, pretending that he had bought too much and couldn't finish it. Every time she was on duty, she would silently help him tidy up his messy desk and put an orange candy in his pencil case, pretending that he couldn't finish it. The two of them carefully tested each other with their shared secrets. There was no bloody misunderstanding, no third party intervened, only the chirping of cicadas in the 17-year-old summer, the camphor tree outside the window, and the two-way rush to secretly poke and prod. This time, they won't miss it.