Unknown no Madousho

A recurring presence in the world, devils are often behind mishaps and unusual events, though many are unaware of their influence. Professor Sakakibara collaborates with a devil named Unknown to address conflicts involving both humans and devils, utilizing the Book of Sorcery to resolve these cases. The one-shots "Furou Kyoudai Tokubetsu-hen" and "Kaizoku-hime" are included in this collection.