Good timewaster.
now, I will not explain the visual side of this, its simply obvious the director, did a stunning job, yet again I cannot simply like it.
as much as a good visual animation with bright comets and remote craterlikeshaped with trees and lakes in the middle of it with other stuning views you can add, I simply find the story describable with two words: Plot Convinience.
as easy as that, not original, illogical and unexplained, simply "dreadful". its quite bad, yet, the visual part adds some points and I personally enjoy good sound a lot, so as much of a cliché fanserviceable trying to get on your feels type of plot this is, the sound really does it, 6 points due to the cool comets and songs but I really hope some other story had such artwork, it would have really been the definite masterpiece