While walking home from work one day, a doctor named Shuichiro notices an angel, Kohaku, stuck on a tree while being attacked by a crow. He rescues Kohaku and, in return, Kohaku offers to grant him a wish. However, Shuichiro does not want one. He likes his life, his work is going well, he has no money problems and he believes in fulfilling his own dreams. So Kohaku decides that the best thing to do is stay and help him until he does think of a wish they can grant.