Su Wan, an ordinary and tough girl from the Chinese Department, and Lu Shiyan, a cool and reserved top student in the Physics Department, met in an unexpected collision in the university library. One is a delicate and sensitive person who is immersed in the world of words, and the other is a rationalist who is accustomed to measuring the world with formulas and logic. The two seemingly completely different people gradually get closer through the intersections of campus life: from sitting next to each other in elective courses and cooperating in club activities, to sitting side by side in the late-night study room, holding an umbrella together on rainy days... They have experienced misunderstandings and temptations, and they have also supported each other amidst academic pressure, family expectations, and external rumors, and they have slowly seen their inner throbbing. When the fork in the graduation season came, the real distance and choices briefly separated them, but their care for each other finally overcome the obstacles, allowing them to hold hands again after growing up, from the youthful campus to the fireworks world, using time to prove the words "I like you" hidden in their hearts.