Shiro no Keiyaku
Wider-white crow. Because of his unusual color, it is often pursued by other black crows. Once he is seriously injured, because others united against him, and he was saved by the girl. The girl touched by the gentle heart, width asked the devil to let him become a man. However, there is one condition: the widest thing will have to do at least one bad thing a day, otherwise his body will collapse. Can wide really execute this contract?