In another world, an ever-growing Sea of Snow has engulfed the planet surface. The people struggle to survive living around the routes of a massive Orbital Tree, whose branches spread into the Celestial Membrane high above the ground. Change comes to this dying world after Kaina, a boy from the Celestial Membrane, encounters a girl from the surface called Ririha.

Cast:Yoshimasa Hosoya, Rie Takahashi, Ayumu Murase, Maaya Sakamoto, Katsuyuki Konishi, Tomokazu Sugita,

Genre:Animation, Sci-Fi & Fantasy,

country:China, Japan,

Production:Polygon Pictures, Fuji Television Network, Crunchyroll, Sony Pictures, dentsu, bilibili, NetEase Games, BS-TBS,