Based on the legend of a mermaid that has been handed down from ancient times in Okinawa. Taketomi Island has various problems. Koichi and Shunichi meet a girl, Miumi, who has fallen on a sandy beach while the townspeople are in conflict over the future of the island. The uncle, the youth club, and Koichi Nakahama, who work in the Tourism Division, had a lot of discussions about the future of the island, and the smiles disappeared from the people of the island. One morning, Koichi and his younger brother Shunichi find a girl, Miumi, lying on a sandy beach. Against the backdrop of the legend of the mermaid of Yaeyama, Okinawa, this work depicts the beauty of nature by interweaving various problems of the island over the future of the island. Starring Riho Iida, Tetsuya Makita, Masashi Mikami and others.