Haruna Sakurai

In a world where kings are ranked, a kindly little hearing-impaired prince sets off on a journey to become a powerful king, despite all odds.

Born into an aristocratic family in Florence, Italy, during the 16th century Renaissance era, Arte has dreams of becoming an artist. In an age of social classes, Arte is willing to cast aside her aristocratic lifestyle and stops at nothing to achieve her dreams. She finds apprenticeship in a painting studio owned by Leo, an artist who is strict but prioritizes ability over gender.

The thief Mysterious Joker doesn't just steal things. An audacious and elusive miracle-maker, he travels the world searching for treasure with his partner and cook Hachi. As they circle the globe, they must avoid traps set by the police and compete in various competitions to reach their final goal, the Timeslip Treasure.

The anime centers on the battles between the mysterious alien enemy Dark Spinner and the secret defense unit Earth Granner over Earth Energy, the energy generated from the Earth's rotation.