On the surface, Yukitou Youji is a young part-time rider who aims to cycle around Japan, but behind the scenes, he is a "Black Angel," an executioner of the dark who punishes the criminally insane with a single spoke of his bicycle. As Yukitou gets caught up in various cases, he finds allies in former detective and immortal monster Matsuda Kyouji and beautiful assassin Leila, who double-crossed the enemy, and challenges the giant evil organization Dragon Fang Society to a fight. A fierce action-romance that you won't be able to stop reading!