Born from the Clan of the Merfolk, whom uses their voice to protect the peace of the oceans for thousands of millennias. Doria is a mermaid who carries the bloodline of the gods, born down in the deep blue, she has been granted an incomparable singing voice, and a major duty of the Clan of the Merfolk. Doria will forget her memory when she sings the sea song, she will forget her childhood friend Heino and all her childhood memories with Heino are erased and cannot be recovered.