D.N.Angel

Daisuke Niwa, apparently an average teenager until his fourteenth birthday, tries to declare his love to the girl of his dreams, but fails. Suddenly, whenever he thinks about this girl he turns into the legendary phantom thief known as "Kaitou Dark". Daisuke's mother, very much aware of this, makes him turn into Dark and steal valuable works of art for a purpose unknown to Daisuke. As the story unfolds, he learns why, and about his classmate who seems to have the same ability. Throughout the story, Daisuke and Dark fight for the affections of the twins Riku and Risa. Dark, however, has been in the family for generations (on Daisuke's mother's side) attempting to find love of his own and take possession of the body permanently.