The film is "Eternal Sunshine" tells the story of a couple and their memories. Despite the couple losing their memories, but still knowing they will break up in the end, they fall in love again.
There are some of the famous lines from the movie:
"Sometimes I think people don't understand how lonely it is to be a kid."
"You can erase someone from your mind, getting them out of your heart is another story."
"Please let me keep this memory."
L.L.F editor-in-chief Yu-Min Kim