Oninagi, Vol. 4  (English, Paperback, Ishida Akira)

Her average life seemingly forever abandoned, Nanami is thrust into the thick of the intensifying hostilities between the Ministry of Sacred Treasures and the demon organization Arcana. As the situation escalates into all-out war, who will remain standing once the dust has settled?! And will Nanami be able to master the immense power that dwells within her in time to join the fight?!