DN Angel

Niwa Daisuke is your average teenager, until his fourteenth birthday, when he 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 Dark. Daisuke's mother Emiko, very much aware of this, makes him turn into Dark and steal valuable works of art for a purpose unknown to Daisuke. Later, he learns why, and about his classmate Hiwatari Satoshi who seems to have the same ability.