Following a devastating car accident, Hikigaya Hachiman discovers a mysterious system awakening within his consciousness, granting him the ability to perceive grotesque entities known as evil spirits—creatures invisible to ordinary humans. Convinced he alone bears this burden, his solitary understanding shatters when Yotsuya Miko enters his life, her terrified gaze fixed upon the malevolent presence lurking behind him. This unexpected encounter becomes the catalyst for a profound revelation: the world harbors secrets far darker and more complex than he ever imagined, and his newfound power marks only the beginning of an extraordinary journey into the supernatural realm.