It tells the story of a young campus love. At the end of the corridor where the fragrance of cherry blossoms floats, she always bumps into his sight inadvertently. There is an unsent collection of poems hidden in the pocket of his school uniform, and her diary is full of moments when she dared not look at each other. Until one evening when a heavy rainstorm struck, he opened his umbrella and walked towards her who was hiding from the rain alone. The water drops dripping from the edge of the umbrella contained all the thoughts that he was hesitant to express. This encounter, from accidental to inevitable, will eventually bloom into a two-way romance under the fireworks of the graduation season.