Eiji and Kouki are angels whose mission is to manual souls to either paradise or hell. Eiji, the black angel, guides dangerous souls to hell, whilst Kouki, a white angel, guides pure souls in order to heaven. Both have to work collectively as partners to accomplish their particular task. However, God are unable to forgive black angels for his or her accumulated sins, and only provides white angels the power in order to reincarnate. Though Eiji grows strong feelings for Kouki, can he escape the particular cruel fate that Lord has given him?