Youli rushed into the fire scene to save people, but the fire scene exploded just before he came out. However, when he woke up again, he found that there was a life correction program that could revive him. The premise is that he has to travel through nine lives to help a person find the meaning of his life.
In fact, the author just wanted to have the protagonist fall in love with different identities in different time and space under a certain banner.
Intention: The meaning of life lies in having a little bit of 123 in your heart