In junior high school class, scumbag Lin Xiaoman falls in love at first sight with Jiang Xubai, a top student who is fastening his school uniform collar to solve math problems. The unexpected support during duty, the sneak peek in the corner of the library, and the crumpled confession on the scrap paper all hide the girl's clumsiest heartbeat. However, the unsent love letter, the choice of colleges in the north and south when filling out the application form, and the misaligned glances at the graduation ceremony made the two passers-by on parallel lines during their three years of high school.
