"──Ah, I want to be killed by this person..." Born into a family that raises saints, Silvia one day realizes she possesses witch-like powers. She has been praying to the goddess to at least not hurt those around her, but her talents as a saint have yet to blossom, and she spends her days feeling belittled by her family and servants in comparison to her brilliant younger sister. Amidst all this, she is suddenly ordered by her father to enter into a politically motivated marriage with a renowned holy knight known as the 'Witch Slayer'──