Snowball Earth

"“Yukio, I’m going to make a friend.” For shy young Tetsuo, the only friend he’s ever known is the giant robot 'Yukio'. Together, they defended humanity as its “saviors,” standing against intergalactic kaiju that invaded from space. A decade has passed since their final, desperate battle for humanity’s survival. When Tetsuo finally returns to Earth, he finds a world transformed into a frozen wasteland - an icebound planet now known as 'SNOWBALL EARTH'. Carrying the promise he once made to Yukio deep in his heart, Tetsuo takes his first steps into this strange new world."