Five pirates, Core and Mara.

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

A girl named "a girl who lives in the southern archipelago of Mara, lives in a small island with her best friend," Napopo. "
One day, Core receives a telegram from her friend," Mayo, "asking for help. After reading the telegram and knowing that a state of emergency had occurred, Core hurriedly boarded the ship and headed for Mayo.
When Core meets Mayo, she learns that Mara's five pirates have ransacked the island of" Karis, "where many of her friends live, and that the pirates have set up a" pirate ordeal. "In order to get Karis back on track, Core and her friends resolve to take on the ordeal.