I want to be the sky - sakurai hiroki (koizora)

"Hiro: Where do humans go after they die?
Mika: Heaven.
Hiro: I want to be the sky. So I always know where you are.
Mika: Like a stalker.
[Hiro smiles]
Mika: Clear skies will mean you are happy. Rain will mean you're crying. Sunset means you are embarrassed. Night will mean you are gently holding me."

taken from a movie KOIZORA