After watching it for the second time and watching the film review, I realized that at the end, the male protagonist realizes that the female protagonist who has a successful career in this time and space is the life that the female protagonist should have, rather than going back to the time and space where the female protagonist cannot achieve what she wants. There was no hope of being together anymore, but in the end the heroine chased after them and they were together again, so it was a good ending.
I don't think there are two or three different worlds, but they chose this result together, this time and space, so there is only one hero and heroine. The unhappy hero and heroine in the past have become the men and women of this time and space. Lord.
View more about Love at Second Sight reviews