Opoona is the story of a boy who is a descendant of brave warriors, known as Cosmo Guards. These Cosmo Guards strive to maintain universal peace. During a trip to the planet Landroll, Opoona becomes separated from his family. His brother and sister are missing, while his parents are hospitalized with serious injuries. In order to search for his siblings, Opoona must get a job and a license to travel between colonies.

Developed by Arte Piazza producers of the Dragon Quest series