In her sophomore year of high school, Jing Zhixia's math scores were always at the bottom, until Jiang Xubai, the aloof scholar, became her exclusive tutor.
In countless classrooms at dusk, he turned obscure formulas into tender love words, accompanied her from failing to steady progress, and accompanied her through the entire chaotic high school.
From the cautiousness of their first meeting, to their closeness under an umbrella on a rainy night, to their tender kiss in an empty classroom, they secretly hid their feelings in their exercise books and agreed to be admitted to a university in the same city together.
But in the summer after the college entrance examination, a sudden immigration notice broke all the agreements.
He couldn't stay where he was, and she couldn't wait for the future together.
There are no bloody quarrels, no hurting each other, only the cleanest regrets in youth.
Later, she was always good at math, but she never saw the boy who taught her how to solve problems again.
He became the gentlest passer-by in her long youth.
Concept: Gentle encounters in youth may not always have a happy ending.