The plot setting is super good, the logic is perfect, and the whole story is told very satisfactorily. Just doing this is really not easy for the time-travel story.
It seems like a paradox to change the past or follow the reality. If you change your past, will your life really start to be happy? I am afraid that this is also the other side. I always feel that if it was what it was before, it will be what it will be now. But probably, nothing should change because you can't.
The emotional points in the film are not very easy to get. I can only say that no matter which world line I am in, whether I still have you in my memory or not, I can always recognize you in the crowd.
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