Nightmare x Deathscythe 1

Natsume Rinne lived like a normal female student. Until she finds out her own darkest secret... She lost her father a few months ago when they was attacked by a demonic cult. At that moment, she awakened the power of the "Shinigami" she holds within her and takes revenge on the cult members. The following peace does not last long, and she is captured. Akuta, the leader of the cult branch, turns the spear of resentment against Rinne, who was hurt by Rinne's father.. and then wandering exorcists Shindo Setsuna and Yuuka appear! What awaits beyond this desperate situation!?