In the southern city of the 2010s, before smartphones became commonplace, the innocent campus atmosphere was preserved. The century-old campus of Nanhua Middle School retains the teaching building of the Republic of China architecture. The bell tower and the old locust tree form a unique campus memory point. Lin Xia, a key transfer student in the province, encounters Jiang Chuan, a thorn in his grade. A misunderstanding caused by math notes reveals the entanglement of their fates.
Purpose: The promise made on the eve of the college entrance examination is made with Sophora japonica, and the reunion spanning seven years fulfills the youthful promise in the light and shadow of the bell tower.