quietly happened that year

During high school, among Ling Yunxiao's countless crushes, there was a boy named Shi Caichun.At first Ling Yunxiao hated being admired by the same sex, but after that, times changed.Nine years later, Shi Caichun disappeared for nine years.A private detective was entrusted to find the missing person. He found Ling Yunxiao, hoping that Ling Yunxiao could recall the past nine years ago, and find out the truth about Shi Caichun's disappearance and his current whereabouts...