When Lu was obsessed with his senior Lin Wan, he borrowed the wrong book for the nth time in the library and successfully took away the notes of his top student Shen Yichen who was reading quietly, the gears of fate began to turn. In order to 'compensate' for the 'loss' of a notebook, Shen Yichen proposed one-on-one tutoring as 'compensation' and started a daily 'binding' routine in the library, milk tea shop and campus trails. One firmly believes that love is far less lovely than milk tea and desserts, while the other uses scientific logic to make every decision - until he silently remembers all her preferences and serves her the sweetest porridge when she is sick. With the laughter of supportive roommates and bad friends, this daily campus life that started with "borrowing books" gradually turned into the sweetest love song of youth. This is a story about slow warmth, healing and two-way running, full of the fragrance of books in the library, the sweetness of milk tea and the unique heartbeat of youth.