The Bunzuki family has been exterminating demons for generations.
The priestesses born into the family, the elder sister 'Hana Ho' and younger sister 'Haru Ai'.
One day, they learn that the seal of an evil god has been broken, she tries to exterminate it.
However, she is captured by the evil god's tentacles and turned into his servant.
Having sworn allegiance to the Evil God, she returns to Bungetsu's house and leads her beloved sister to the Evil God. ......