This is a youth story about "missing out" and "hindsight".
She once thought that the leaf might belong to her, but in the end she found it lying quietly in another girl's notebook.
Those memories scattered in the autumn wind, ginkgo and the gaps of time piece together a failed but difficult to let go of a secret love, and also express the common regret of everyone's youth - people cannot have youth and the feeling of youth at the same time.
Concept: We are in the wrong season because of the time difference caused by fate.