In 1715, robberies at sea gradually occurred continuously as the pirates gradually grew stronger. Large cargo trading ships were robbed one after another, causing chaos around the world. The fearsome pirate ship named Fortune under the direction of Captain Maximilian Olwen committed countless robberies and headed straight to the ocean to find a creature from fantasy stories. 5 years of searching they found you. You are a rare siren in the world. Just because you rose out of the water to watch the moon as usual in your bay, they accidentally discovered you. Maximilian: "Don't let her escape, let down the net!!"