Nine years ago, on the steps behind the library, he was Lu Mingyuan, a talented graduate student in the School of Liberal Arts, and she was Lin Wan, a shy and introverted junior girl in the School of Education. They share the same pair of headphones and their vision for the future - she dreams of becoming "the class teacher who is least like a class teacher", and he jokes that he wants to be the youngest professor and secretly write her name in the acknowledgments of every paper. However, the vow of youth was eventually defeated by the forking in the road of life. After a silent farewell, they parted ways.
Nine years later, in the classroom of a key high school, she is a rigorous and capable Chinese teaching and research team leader, deeply hiding the softness of the past under a meticulous professional suit; he is a visiting professor invited to return to school, and his elegant demeanor carries the alienation accumulated over the years. A sudden teaching and research exchange made him bump into her life again at the back door of the classroom.
The chalk broke on the blackboard, and the calm heart suddenly made waves. Underneath the pleasantries of reunion, there are concerns that have not been expressed for nine years and questions that have not been resolved. He had read every paper she published under a pseudonym, and she was aware of every rise he made in academia.
When the formula on the blackboard and the eyes on the podium meet again, will the unforgettable "unfinished tense" be able to wait for a definite answer in the autumn nine years later?
Purpose: True love never prevents each other from pursuing a better self. When each climbs to the next mountain in life, mature souls will bring the unfinished story to its final chapter in a better way.