Basara Toujou endures a tough existence, living in a world of constant danger and intrigue. He is the elder step‑brother of two demonic sisters, Mio and Maria Naruse, shielding them from proud demons who seek to seize Mio"s power. Added to this, escalating political unrest in the demon realm heightens his burden.
When a courier brings an invitation for Mio to enter the demon domain, she and her companions venture despite the peril. Now on hostile ground, Basara must strengthen himself through sensual gratification to accomplish the impossible and safeguard all for everyone always.