Spoiler! Nice explanations to understand the whole idea of the movie: Yurika Yuri comment (youtube user): "Actually,each…
When the girl go back to past on the graduation day..she wrote something on the desk with whitener...How does that write reach to the boy..??how did he saw the writing..
Kind of Happy and kind of sad...If you watch the ending you will know..Cause they get separate in one life...Then they get together in another life...So it's neither sad ending nor happy...