The relationship in this world is destined long ago. No one can change it. No matter how many times we come back, it will be the same. Just like she will meet her, recognize her, fall in love with her, and she will sacrifice herself for her. No one can change all of this. Even if we do it all over again, it will only be the details that have changed. As for the ending, it will be the same.
Intention: Go both ways