Ten thousand years later, after global warming, the earth's glaciers melted and tsunamis destroyed the ground, calling it the Ice Age. Later people called this period the Age of Destruction. New humans appeared in this world. At this time, Blue Star still consisted of oceans and land, but polar weather has always troubled people. And our protagonist Bingruo has been living in a place surrounded by a white crystal stone. The thing that maintains their survival energy is their sun - the heart of the ocean. Bingruo has never seen the sea, because it seems to her to be something very far away. She heard an old man say that the sea is boundless, blue and beautiful, and the name Heart of the Sea came from this. Bingruo and the villagers lived there peacefully until one day she rescued an injured soldier by the river, and the balance in the village was broken...
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