Togami Masato is a very unlucky high school boy but he get over with all of it through his positive thinkings and the help from his friends, while doing his job as an exorcist secretly. One day, a "Goddess of Fortune", Kichi, appears before him. Knowing this Masato feel so delighted though the truth is that Kichi was actually a "Goddess of misfortune" who changed her occupation to "God of Fortune" not so long ago, and she still can't use her power to bring happiness that well. And so, a stange cohabitation of the "most unluckiest boy in Japan" and "the Goddess of Fortune" is begun.