In 2010 in Tokyo, a kind of mechanical toy called "PataPi" toys for children with limited artificial intelligence, turning into a desert among the little Japanese. Hibari Hanakoganei, a twelve year old stedentessa of Akihabara, is always dreamed of a strange prince in white. Both opening and ending theme of anime are performed by Masami Okui.
One day she seems to see the boy of her dreams under a tree, and immediately runs to him. But not really find anything except a PataPi fell in the sky right into his hands. Happy as a clam, Hibari baptizes his PataPi Den-suke. The next day Hibari is attacked by a strange woman who wants at all costs its Densuke.