Demonizer Zilch

After the deaths of his childhood friend and younger sister, Io Haruomi is left haunted by guilt and the feeling that he was powerless to save them. He tries to keep moving forward, attending high school and spending time with friends as an ordinary second-year student. His routine changes when he meets an Eda: a girl with glowing red eyes and demonic powers who is fleeing the Seven Great Gospel Organizations. She tells Io that he, too, is an Eda, and that his sense of powerlessness is misplaced. Soon he is caught in a conflict between humans and devils, while his own eyes begin to glow red and the side he belongs to becomes uncertain.