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~Nankoufuraku no Maou-jou e Youkoso ~ Debuff wa Fuyou to Yuusha Party wo Oidasareta Kuro Madoushi, Maou-gun no Saikou Kanbu ni Mukaerareru ~; 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～; 歡迎來到難攻不落的魔王城 ～認定不需負面狀態而被踢出勇者隊伍的黑魔導士，被魔王軍招攬為最高幹部～; The Impregnable Demon King’s Castle and the Expelled Black Mage of the Hero’s Party