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"… Berith, one of the commanders of the great demon Asmodeus and a duke of the hell society was sealed away in the Pandora's box several 100 years ago. The reason to him getting sealed away was the betrayal of one of the high demons 'Beelzebub'."
"High demons… Great demons. I don't understand a thing!"
"Same here!" says Elm and Kirio but Sylvie doesn't hear them and continues to read.
"There's so little information about demons in this book… Let's see Great demon Asmodeus… Here. 'One of the most respected dukes of the hell society with great power over many of the lower and lesser demons and dukes. Sealed away in the Pandora's box several 100 years ago. The reason to him getting sealed was the betrayal of one of the high demons 'Beelzebub'."
"So basically, all the strong demons were sealed away by this guy… Beelzub."
"But if Beelub sealed them away then how did Tatsuya form a contract with the demon?"
"Maybe it's a lesser demon?"
