Seductive Nightmare

Enmu Tamio's keenest pleasure in life is bringing humans their greatest nightmares. He's lived for hundreds of years and has never met a human that held any kind of value to him until he meets a young woman named Mandi White. Can a chance encounter cause an oni like Enmu to feel humanity again after all these centuries? Perhaps a seductive nightmare can turn out to be a beautiful dream. Based of the anime Kimetsu no Yaiba (Demon Slayer).