Easygoing Lin Xingchen smashes the aloof top student Lu Yubai's starry-sky model and is forced to sign a labor contract as his “lab assistant.” She expects to face a permanently frozen iceberg, but when she sees him gazing at the fragments late at night, she glimpses a trace of loneliness.
He is a precise, rational physics genius; she is a sensitive columnist. In the lab, he teaches her to find romance in the river of data among the stars. In her anonymous column, the cold “Mr. Z” she writes about gradually begins to warm up.
From a mint candy no one noticed to recording nebula data side by side; from parallel lines in an elective class to the paths of fate quietly intertwining. An iceberg melts slowly, but every degree of warmth brings the refreshing sweetness of mint and the brilliance of starlight.
This is a sweet “debt” that begins with an accident, and a story of mutual healing, warmth, and watching over each other. When starlight falls to earth and turns into candy, it turns out the sweetest universe is in your eyes.