Petals is about Princess Petal, who is being corcerned about herself. Or more clearly, her "Past Self". Her twinbrother Prince Metal has got the same problem. When
they where little, Petal cursed the world in a magical way, she acted, however, later on she discovered she discovered she actually had magical powers. She's concerned that
her past self may show up someday and make the curse come true. If so, past Prince Metal will help too.
After a while they showed up as Dark Petal and Dark Metal. Petal and Metal will try to stop their dark-selfs, along with Aimi, Cho, Hina, Chen and Pantera. And eventually Zethunia.