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Umisekai is a an Aquatic planet orbiting the star Setsuri. Umisekai is home to many resorts and floating islands. Umesekai is the oldest human colony. Umisekai was settled by Japanese spacers in the 21st century AD. Umisekai has many native species including Giant space Whales, and flying squid creatures. Umisekai is also were the an primative form of the Corruption Virus was found and genetically altered using Symbol Alchemy.