When the reckless girl Lin Xiaoman dumped popsicle syrup on the limited-edition jersey of school tyrant Cheng Ye for the third time, this youth equation with the fragrance of lemon officially kicked off. He is a rumored math genius who smokes and fights, and uses function formulas to draw dating maps on the back of scratch paper; she is an English class representative, but during tutoring she discovered that the fierce school bully actually drew bear illustrations for trigonometric functions. The mint candy kiss on the top floor of the library, the Doraemon umbrella held up by the Communist Party in the heavy rain, the boy using a star map to express his love in the abandoned observatory, turning the summer of seventeen into a fizzy orange soda.
The incomplete moon is tattooed on Cheng Ye's collarbone, which is Lin Xiaoman's childhood work that was lost in the painting competition when he was six years old; Lin Xiaoman's band-aid locked in the iron box seals the heartbeat rate of Cheng Ye when he rescued the injured cat in the second grade. From the cram school to the graduation ceremony, from running in both directions by accident, they spent seven years proving that all accidental collisions are inevitable after careful calculation, just like the parabola will eventually reach the destined coordinates, and I love you is the most perfect convergence domain in the universe.
Purpose: Through the collision of mathematics and youth, it is revealed that true love is the optimal solution of the fate function. A formula is used as a metaphor for the precise trajectory of a two-way secret love, and the sourness of lemon and the coolness of mint are used to represent the chemical reaction of a young heartbeat. The time and space echoes between star maps and tattoos prove that those seemingly accidental heartbeats are actually inevitable encounters carefully calculated by the universe.