Daisuke Niwa was just an average ordinary junior high school student at Azumano No.2 Junior High. At least until his 14th birthday.

On the night of his 14th birthday, Daisuke turns into "Dark" the great Phantom thief whose identity remains unknown. The key to his secret lies in his body's DNA. The "Dark" which lay sleeping inside him was awoken by his emotions for love. But will his feelings actually become reality?

The Phantom thief's name is "Dark". His identity... no one knows. Tonight we fell in love. A love with many problems lies ahead, one truly difficult to steal.