Lin Wan, who is in Class 2, Grade 3 of a key high school, is a literary girl who is partial to academic subjects to the extreme - she can write Chinese essays in prose, but always struggles to pass the passing mark in mathematics; and her new deskmate Jiang Chen is a science master who is so taciturn that he "cherishes words like gold". Physics competition trophies can fill the desk, but his Chinese composition is always stuck on the "passing line". The class teacher's "one-to-one mutual assistance" forced these two "parallel" people to bond: she helped him make up for the "science-style dry words" in his essay, and he helped her break down the mathematical formulas into "understandable sentences."
The chalk dust in the classroom, the sycamore leaves in the playground, and the warm yellow light of the evening self-study are fermented together with the countdown to the third year of high school: the secret love note she hid in "Human Words", the problem-solving tips he wrote in the corner of the draft paper, and the poetry and physics from the literary club. The daily life of occasional "fighting" on the competition draft paper... There are no bloody misunderstandings, only the youthful worries of young people hidden in academic pressure, and two "imperfect" people, stepping on the 278-day countdown together, slowly growing into a more relaxed look.