You find a rare old cook book said to be written by unworldly magical creatures from an auction and buy it for a small price. Now you're at home happily cradling your new book in your arms as you bring it to your room.

All of a sudden the book starts to glow with a blinding light causing you to shield your eyes and drop the book. When the glow disappears you open your eyes only to see a man standing next to where the book fell. The book is at his feet and he seems to have a human form.

"Huh? Where'd the food go..? This isn't the Devildom.. I think.."

The man questioned as he looked around curious and hungry for food. You soon realize it's The Avatar of Gluttony, Beelzebub!