On the first day of the second year of high school, Su Wanwan, a "little confused" in liberal arts who was very partial to subjects, unexpectedly became a roommate with Lu Xingchen, the "cold man in science" who had always ranked first in the grade. One is a romantic girl who always draws a little sun on her math paper, and the other is a rational god of study who even writes formulas on his scratch paper. The extreme contrast between personality and grades makes the two have constant conflicts as soon as they sit at the same table. Su Wanwan secretly worked on the questions in order to catch up with her classmates, but she always got stuck in front of the difficult problems; Lu Xingchen seemed indifferent, but he would silently hand her hot milk when she stayed up late to catch up on homework, and circled the key to solving the problem with a red pen when she was forced to cry by the difficult problems. Cycling together in the summer night wind, a desk lamp shared in the library, an unexpected princess hug at a sports meeting, cheering notes written for each other before the college entrance examination... From tit-for-tat to mutual dependence, in their youthful student days, they fought together against the anxiety of partial subjects and the expectations of their elders. In the end, they not only received the admission notice from a top university, but also held tightly the hand that held the summer night breeze and the tenderness of youth.