Nankoufuraku no Maoujou e Youkoso

Welcome to the Impregnable Demon King Castle ~The Black Mage Who Got Kicked out of the Hero Party Due to His Unnecessary Debuffs Gets Welcomed by the Top Brass of the Demon King's Army~, 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~