Heaven — Alice Hunter

Giune is a girl who feels she, opposed to the others, is not alive. This feeling causes her to run away from home. There, in the steadily falling snow, she meets a boy. They share their strange feeling, and they decide to look for Heaven together. Meanwhile, Ehkiuss faces her own problems in a paralel world. The story follows both of them through a series of events that no one could have foreseen.