At the beginning of the second year of high school, transfer student Su Wanxing had just entered Xinghua Middle School. He formed a "liangzi" with Lu Chi, the top grader and the ace of the basketball club. He accidentally stepped on his limited edition sneakers and debated a physics question with him in class until he turned red. They thought they were incompatible enemies, but they quietly fell in love with each other again and again: when she was trapped by a problem, he would quietly push the draft paper full of problem-solving ideas under her desk; when he was injured in a basketball game, she would hold a band-aid on the sidelines of the game and be so nervous that her fingertips turned white. The throbbing of youth is hidden in the afterglow of morning reading classes, in the silence side by side on the way to school, and in the purring of the stray cat "Little Orange" that the two take care of together. However, family differences, the pressure of entering higher education, and the obstruction of the school beauty who secretly has a crush on Lu Chi made this young relationship frequently frustrated. Su Wanxing gradually discovered that the seemingly indifferent Lu Chi actually hid an unknown softness; and Lu Chi was also deeply attracted by Su Wanxing's tenacity and optimism. They went from tit-for-tat to protecting each other. In the midsummer when the cicadas were chirping, they worked together on solving problems and fighting for their dreams. Finally, on the day when the college entrance examination ended, they expressed their love that they had hidden for a whole year in the summer night wind.