Nadat Leo Demonhart de mensheid heeft gered van de verachtelijke Demon King, verdient hij geen heldenstatus. In plaats daarvan wordt hij met achterdocht en vijandigheid bekeken door degenen die hij probeerde te beschermen. Behandeld als een paria die nergens anders heen kan, zoekt de verbannen Leo een positie in het leger van zijn voormalige aartsvijand! Maar het leger is niet meer wat het ooit was voordat het werd verslagen door Leo's handen, dus om zijn nieuwe positie te behouden, moet Leo de troepen weer in gevechtsvorm brengen.
| Visual Effects | 中野裕紀 | Character Designer |
| Production | 万木壮 | Executive Producer |
| Production | 河本紗知 | Producer |
| Production | 佐々木史朗 | Executive Producer |
| Production | 伊藤将生 | Producer |
| Production | 田中翔 | Executive Producer |
| Production | 礒谷徳知 | Producer |
| Production | 川島誠一 | Executive Producer |
| Sound | 内田峻 | Music Producer |
| Production | Juno Shin | Executive Producer |
| Sound | 佐藤正和 | Music Producer |
| Production | Tomonori Kumagai | Producer |
| Production | 山崎明日香 | Executive Producer |
| Sound | 深水円 | Music Producer |
| Sound | 鈴木みのり | Theme Song Performance |
| Sound | Mao Yamamoto | Main Title Theme Composer |
| Sound | Mao Yamamoto | Music Arranger |
| Sound | 瀬名航 | Music Arranger |
| Sound | 瀬名航 | Main Title Theme Composer |
| Writing | 瀬名航 | Lyricist |
| Production | 高橋賢太郎 | Executive Producer |
| Writing | 村越繁 | Series Composition |
| Sound | 森下広人 | Sound Director |
| Editing | 新見元希 | Editor |
| Art | 杉山友美 | Prop Designer |
| Sound | 東山奈央 | Theme Song Performance |
| Art | 徳田俊之 | Art Direction |
| Camera | 江間常高 | Director of Photography |
| Camera | 石黒瑠美 | Director of Photography |
| Visual Effects | 鈴木咲絵 | Color Designer |
| Sound | 宗本康兵 | Original Music Composer |
| Production | Naoki Kishida | Producer |
| Art | 泉寛 | Art Designer |
| Directing | 信田ユウ | Series Director |
| Directing | 石井久志 | Series Director |
| Sound | 八十正太 | Sound Effects |
| Sound | 黒崎裕樹 | Sound Mixer |
| Visual Effects | 桑谷伊智 | Opening/Ending Animation |
| Sound | Momoka Yamada | Foley Artist |
| Production | Julien Vig | Producer |
| Production | 宮本秀晃 | Producer |
| Art | 天野英 | Original Series Design |
| Visual Effects | 天野英 | Character Designer |
| Writing | クオンタム | Novel |
