In the future, society is sharply divided between the upper and lower classes. The upper class places greater emphasis on self-interest, leaving little room for emotion, while material scarcity among the lower classes has made their spiritual lives exceptionally rich. As tensions between the two classes continue to grow, the profession of Love Guide has emerged. Love Guides are ranked from one to nine, and ninth-grade guides have the absolute right to choose their assignments first. Gu Yetang has just been promoted to ninth grade, and she's already itching to take on clients!