A world where it has been established that people routinely swing between slightly different parallel worlds. Koyomi Takasaki, who lives with his mother following his parents’ divorce, enrolls in a local university prep school. Due to the atmosphere concentrated on studies and his social awkwardness, Koyomi is unable to make friends. One day, he is suddenly approached by his classmate Kazune Takigawa, who tells him that she has travelled from the 85th world where she and Koyomi are lovers.
Quotes from the movie:
From the moment they’re born, people make countless choices. The worlds with the option you didn’t choose are alternate realities. In other words, parallel worlds.
Would you rather be sad yourself, or for someone else to be sad?
Because of a momentary mood or whatever other reasons, people do things that make others sad. Usually they only realize their mistake later, and wonder why they ever did those things. But at that point they can’t fix it, so they suffer the pain of that sadness over and over.
I wholeheartedly planned to make friends. But reality was not so obliging.
If there were 100 worlds with 100 of me and 100 of you. I’m sure the 100 me’s would love 100 you’s.
I realized that the reason I could take joy in a stranger’s happiness is because I’ve known happiness myself.