It's Daisuke Niwa's 14th birthday and he's not having a good day. He tries to confesses his feelings to Risa Harada but finds out she only likes him as a friend. A student Satoshi Hiwatari oversees Daisuke using skills he's not supposed to have in order to unlock an electronic lock at school. When he challenges the training traps at his house, Daisuke transforms into the phantom thief Dark a black angel that has reside within the male members of the Niwa family for generations with the purpose of stealing cursed artworks. Daisuke learns he can't transform back into himself until he steals the Saint Tears statue tonight, and that becoming Dark is his destiny. As Dark escapes, he flies by the Harada mansion, and kisses Risa's older twin sister Riku Harada.