Happy World!

A man named Oomura Takeshi has endured a lifelong streak of misfortune. One day, while experiencing another unfortunate event, he encounters an angel named Elle. Through her, he learns that his father placed the curse of bad luck on him. Though given the chance to transfer the curse, Takeshi chooses to keep it in order to save a young girl. As a reward for his selfless act, Elle becomes human and moves in with him to help shield him from the curse, a situation that Takeshi finds inconvenient.