Welcome to the Impregnable Demon King Castle – The Black Sorcerer Is Offered a Seat as a Member of the Demon King Army’s Top Brass After Being Kicked out of the Hero’s Party Because They Didn’t Need Debuffs

Native title: 難攻不落の魔王城へようこそ～デバフは不要と勇者パーティーを追い出された黒魔導士、魔王軍の最高幹部に迎えられる～