Great Voyage, the Legendary Commander's Secret Treasure

Legend has it that Roger, the Pirate King, said before his death that he left behind the treasure ONEPIECE, which is the most powerful in the world in terms of wealth, fame and strength. Many people competed to go to sea to compete for ONEPIECE. Many pirates initially established their hegemony and formed the era of great pirates. I don't know when a commander's secret treasure was circulated on the sea. Suddenly, an organization of girls called ship girls appeared on the sea. They competed to go to sea for the commander's secret treasure. A certain commander: "Go and look for it, I put the Ring of Oath right there!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.