Nightmare Eater vs Demons

Kanomiya Tsukuru has a special ability since childhood. He can see the people's misfortunes manifested in the form of a black mist, and he can even purify them. Kanomiya has spent most of his life keeping his ability a secret, but on his first day of high school, he sees a beautiful girl, Arisu Howl, smothered by the black mist. Smitten with her beauty, and worried for her future, Kanomiya starts stalking Arisu... and an action-packed supernatural school adventure begins!