"Nightmare x Deathscythe" ~Hangyaku no Resonance~ follows Rinne Natsume, an ordinary high school girl whose life is shattered after she loses her father to a demonic cult attack. Awakening to the power of the Shinigami within her, Rinne seeks vengeance on the cult, but her fight escalates as she and her allies become trapped in a dark world of twisted rituals and dangers. This hentai series blends fantasy, dark supernatural themes, and intense adult scenes, creating a gripping narrative of revenge and supernatural conflict.