When the late summer wind blew the sycamore leaves past the classroom window, Lin Wanxing noticed the transfer student Jiang Yubai for the first time - he passed by holding an old desk, the cuffs of his school uniform were stained with chalk dust, and the sun fell on his drooped eyelashes, like a handful of gold. As a "good girl" who was firmly in the top three of her grade, Lin Wanxing's world only consisted of the wrong answer book and the sound of morning reading, until Jiang Yubai became her deskmate, disrupting all her established rhythms: it was the mints quietly handed to her during morning reading, it was picking up the test paper that was blown away by the wind for her in physical education class, and it was the deliberately slow pace when walking with her through the dark alley after evening self-study. But youth is never a smooth road. Jiang Yubai hides the secret of family changes. Lin Wanxing faces the high pressure of his parents to "forbid puppy love". The school belle in the next class deliberately approaches and the ranking of the mock test fluctuates, all of which are testing this ignorant relationship. When the cicadas sing from midsummer to late autumn, and when the confession letter hidden in the math textbook is accidentally uncovered, the two boys and girls finally understand: the best youth is to study questions with you until late at night, to smile at each other when standing side by side on the podium, and to have the courage to walk towards each other firmly even across a sea of people.
