In the fictional "Galaxy City", two neighboring universities - "Nebula College" which focuses on art and design and "Xingchi University" which focuses on science and technology - have been at each other's throats all year round for competing for seats in the cafeteria and occupying library resources. Su Xiao, a 20-year-old sophomore student in the Department of Illustration at Xingyun College, is a "poor person" who wakes up every day by his roommate. His biggest worry is "can't finish his homework + can't get the sweet and sour pork in the cafeteria"; Lu Yan, a 21-year-old junior student in the Department of Computer Science at Xingchi University, is the famous "paper king" in the school. He started writing questions at five in the morning, but due to an accident, he and Su Xiao fell in love - When grabbing the last piece of sweet and sour pork, he accidentally splashed the soup on Su Xiao's drawing. There is a legend that has been circulating for hundreds of years in Galaxy City: every year on the "Double Star Conjunction Day" (an astronomical phenomenon unique to Galaxy City), if two people with "unresolved conflicts" see a shooting star at the same time, their souls will exchange and the details of the legend will be temporarily forgotten.
