After Xiaobai and Xiaoxue graduated together, they came to a strange city and a strange hospital to work as nurses. Xiaoxue and Xiaobai both have an angelic figure and face. When they were in college, they all called them Snow White. Now they have become angels in white. Once they come here, they have become the targets of many people to pursue, but they are not moved because they fell in love with SM when they came to college in the morning and gradually became enthusiastic SM.