On the first day of school, Chu Yu and Lu Shi faced each other tit-for-tat and did not like each other. But what was unexpected was that because of a chance encounter before, Chu Yu was inspired by Lu Shi's blood to have a hidden strange blood, and he needed to take a pill every day. Only two drops of blood can survive. Besides, except for Lu Shi, everyone's blood is bitter and smelly, and cannot be used to continue life. The author's writing is delicate and vivid. When learning from Lu Shi, he seems indifferent and careless about everything , paranoid and difficult to understand, but burdened with an extremely heavy past, it is difficult to break free, and walk alone. The school girl Chu Yu, with a transparent personality, is very narcissistic. After experiencing the pain of growing up, she gradually finds the meaning of moving forward. As the bond between the two continues to deepen, Lu Shi and Chu Yu gradually become each other's psychological support, warming and supporting each other.