The world of mathematics teacher Xu Zhiwei once strictly operated in a coordinate system called "Su Yuan".
This is a secret love that travels between coordinates and shackles. Can Xu Zhiwei use rational formulas to solve the heart-moving puzzle? With the approach of "Mu Qiang" and Shen Qingyan's warning, how does she face the age gap and the risks of the system? When the speed of falling cherry blossoms is recalculated, where will her and Su Yuan's vague obsession of "looking forward to returning together" go? Outside the quadrant, whose trajectory will the heart-shaped curve eventually trace?
Intention: Within the quadrant of secular rules (system, gender, age boundaries), explore the emotional possibilities in the depths of human nature that transcend convention, and show the loneliness, struggle, awakening and tenacious pursuit of individuals in secret love.