Lin Xiaoyou, a confused freshman, mistakenly stuffed a childhood photo sandwiched in a textbook into senior Bingshan's schoolbag, triggering # SakuraCP# hot search on campus. When the whole school used canteen secret codes, textbook graffiti and morning running encounters to help the childhood sweethearts, she did not know that Gu Nanzhou had already hidden the star trails that she dared not say for seven years in the carbon paper of the application form, the back seat of the bicycle and the morning meeting speech. Until that rainstorm, he clenched the second button of his school uniform and said, "Have you counted? Every time you turn your head to look at me, there will be an extra notch on the desk."