Takeshi Oomura is a rather unfortunate individual. He has suffered from this streak of bad luck since childhood. One day, during his usual routine plagued by misfortune, he encounters an angel named Elle and discovers that his father had cursed him with bad luck. Takeshi is given the chance to pass the curse on to someone else, but he chooses to keep it in order to save a young girl. As a reward for his noble deed, Elle becomes human and moves in with Takeshi to protect him from the curse, a situation that does not particularly please him.