Shiro is a white crow. Because of his unusual color, heâ€™s often bullied by the other black crows. One day, heâ€™s hurt badly because the others ganged up on him, and he was saved by a girl. Moved by the girlâ€™s gentle heart, Shiro asked a devil to let him turn into a human. However, thereâ€™s one condition: Shiro will have to do at least one bad deed a day, otherwise, his body will crumble. Can Shiro really fulfill this contract?