Female CEO Le Zhengxi has the ability to see the remaining life of everyone. Le Zhengxi, who has only 120 days left to live, met Chen Xu, a healing boy who worked part-time to earn medical expenses for his sister, because of a bar conflict. After Le Zhengxi kissed Chen Xu by mistake while drunk, she found that her life was extended by one day, and Chen Xu's life was shortened by one day. In order to survive, Le Zhengxi hired Chen Xu as an assistant with a high salary, providing daily kissing services, on the grounds that she had "kiss hunger".