I Light Incense to Worship the Gods

I am a person who was told since I was a child that I would not survive until the age of 18. I never thought that after turning 18, I would treat illnesses and save people! Wait, ancestors, how can you let an outsider be my leader of the Monument King? From then on, he protected me and loved me, and he fell asleep every night... They all say that cause and effect cycle, it turns out that he is not only my destiny, but also my destiny...