Director: Makoto Shinkai. 106 min. Rated PG. Japan. Animation.
A teenage boy and girl, distant from each other (both location-wise, and other-wise), suddenly start switching bodies for an entire day, every few days. But this not a simple Freaky Friday situation: the two incorporate their characters into the other person's life, making this a switch of gender characteristics, not just mere bodies, and an animation wildly open to interpretation. My take, was a painful presentation of "out of sight, out of mind": no matter how long and close you've been with a person, no matter how hard you hold on, they start vanishing from your memory after their gone.
PS: This was Japan's highest grossing film of 2016, and the highest grossing anime film of all time worldwide.
PPS: Thanks again, Ali S! Although I was hoping that ending wouldn't happen ...