My Childhood Sweetheart Turned Out to Be a Sword Fairy

Ning Tianran came back from work and wanted to play games. As a result, I received a call from my father saying that my childhood sweetheart was coming to stay at his home for a while. Thinking of the happy times I had with her, I haven't seen her for a long time. Then he went out with a smile on his face. What do you mean my childhood sweetheart is flying in the sky with a sword? What does it mean that my childhood sweetheart has a golden finger that can travel between two worlds? What? Do you want to take me to practice immortality?