A legendary treasure map with directions to a whole new world was discovered in an old bookstore. The peppy, optimistic adventurer Mai, her childhood friend Kenichi, and Kenichi’s pal Takuya embark on an adventure into a cave that’ll lead them to another world.
Having arrived in the new world, Mai quickly sets out with her quirky friends to search for the legendary treasure hidden away by the famous treasure hunter Leonardo. But Mai and her friends aren’t the only ones with their eyes on the riches. What awaits Mai and her party when rival hunters emerge, ready to fight for the valuable treasure?