Song shu zi sha shi jian

Oshima wakes up in the middle of a desert in South America with no memory. A woman named Coco is lying beside him. Coco tells Oshima that he was originally planning on crossing the desert with his girlfriend May to get to Snow Mountain, but May suddenly disappeared, leaving him at bay. Coco helped him out by chance, and now they're heading to Snow Mountain together. Perhaps May is already there.