Jiang Jin, a first-year graduate student, is an ordinary girl who is socially anxious and lacking in self-confidence. She secretly writes her feelings for her junior, Yu Qingye, in her diary. Little does she know that the cool, dazzling table tennis prodigy has already carefully planned a long-awaited encounter with her. Helping her carry her luggage, practicing table tennis with her, and even writing a song for her are all carefully orchestrated coincidences. When a misunderstanding nearly causes their sincere feelings to go unreturned, the young man waits for ten hours in the cold rain just to hear her explanation. Beneath a sky full of stars, he makes a heartfelt confession with a love song written especially for her. It turns out that the sweetest ending to a secret crush is when both hearts find their way to each other.