Within the Takagami Family, brothers Toru and Noburo face a perilous existence due to Toru's Yin-infused blood attracting yōkai and other supernatural beings in Japan. When Toru becomes a target, Noburo summons the fox deity Kūgen Tenko to shield his brother from harm. Now, Kūgen safeguards both Toru and Noburo, defending them against all threats while navigating the complexities of the contemporary world.