After the college entrance examination, Xia Jing received a call from her junior high school monitor, inviting her to attend a junior high school class reunion. Xia Jing, who had no interest in it at first, overheard the news that "he" was also going, so she agreed. Xia Jing, caught in memories, began to think of the junior high school life that seemed far away and yesterday, the boy who never said goodbye, and the unsolved mysteries of those ignorant times.
"Hi, Xiaojing!"
"Long time no see."