A diary hides her unspoken secret love, from the secret gaze in the back row of the classroom, to the tacit understanding of each other in the library, to the relief of standing side by side many years later. Time witnesses the heartbeat of youth and records every step of the two people getting closer as they grow up. The sourness and sweetness of secret love are all hidden in the chirping of summer cicadas and the wrinkles of time.
Concept: Struggle for self-identity and the reshaping of emotions by time