An Icy Voice Is Calling
Daisuke is sick. Satoshi warns Daisuke that something is up. Kosuke has a friendly chat with Satoshi. Daisuke enters the world of his painting, led by an entity known as "The Second Hand of Time". Dark has to steal the painting from the Harada household in order to bring Daisuke back.
Aired 21/08/2003EP 21 - An Icy Voice Is Calling

D.N.Angel
Niwa Daisuke is your average teenager, until his fourteenth birthday. 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 Mousy. 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.
(Source: Anime News Network)