Ooyukiumi no Kaina  

Kaina of the Great Snow Sea, 大雪海のカイナ

In this world, there is an abundance of snow covering everything with no end in sight. People struggle to survive by either living near large trees on the surface or up in the canopy that covers the atmosphere. An encounter between Kaina from above and Liliha from below leads to a series of events that will alter the future of this world.