When Lin Shi touched the yellowed graduation photo for the third time in the school history museum, the sweetness of strawberry milk mixed with the taste of rust spread on the tip of his tongue. He saw the teenagers in the photo suddenly turning their heads and looking in a direction outside the camera with horrified expressions - and at that position, Ye Kong, who was also wearing mechanical watch earrings, was standing.
When observing a meteor shower, Gu Ming, the president of the Astronomical Society, discovered that the star map birthmark on Shen An's wrist matched Einstein's equations on the back of the pocket watch perfectly. When they solved the Morse code in the annual rings of a century-old locust tree on a rainy night, the bell of the old teaching building suddenly rang in reverse, and seven rusty school badges rolled down along the cracks in time and space, each with their names engraved on them.
Ye Kong, who was cursed by music, picked up the expired milk in Lin Shi's schoolbag in the loop of time and space. The expiration date number happened to correspond to the 12th day when he fell into the loop. In the dark and blank sketchbook, the parallel time and space coordinates recorded in Gu Ming's grandfather's diary gradually emerged. When two teenagers in time and space become mirror images of each other, they must solve the ultimate mystery of the "Blue Sky Paradox" before the graduation ceremony: Is it the dislocation of time and space that creates their bond, or is the bond itself rewriting the gears of time?
Intent: Prisoners of time and creators of self, when the protagonists discover that they are both the product of a closed loop of time and space and a variable that rewrites the rules, they explore the dialectical relationship between "inevitability of fate" and "free will"