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 | 河本紗知 | Producer |
| Sound | 内田峻 | Music Producer |
| Sound | 佐藤正和 | Music Producer |
| Sound | 深水円 | Music Producer |
| Production | 伊藤将生 | Producer |
| Production | 宮本秀晃 | Producer |
| Production | 礒谷徳知 | Producer |
| Production | Tomonori Kumagai | Producer |
| Production | 田中翔 | Executive Producer |
| Production | 万木壮 | Executive Producer |
| Production | 佐々木史朗 | Executive Producer |
| Production | 山崎明日香 | Executive Producer |
| Production | Seiichi Kawashima | Executive Producer |
| Production | 高橋賢太郎 | Executive 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 |
| Writing | 村越繁 | Series Composition |
| Art | 杉山友美 | Prop Designer |
| Art | Toshiyuki Tokuda | Art Direction |
| Camera | 江間常高 | Director of Photography |
| Camera | 石黒瑠美 | Director of Photography |
| Editing | 新見元希 | Editor |
| Sound | 森下広人 | Sound Director |
| Sound | 東山奈央 | Theme Song Performance |
| Production | Naoki Kishida | Producer |
| Art | 泉寛 | Art Designer |
| Visual Effects | 鈴木咲絵 | Color Designer |
| Sound | Kouhei Munemoto | Original Music Composer |
| Directing | 石井久志 | Series Director |
| Sound | 八十正太 | Sound Effects |
| Directing | 信田ユウ | Series Director |
| Sound | 黒崎裕樹 | Sound Mixer |
| Visual Effects | 桑谷伊智 | Opening/Ending Animation |
| Sound | Momoka Yamada | Foley Artist |
| Production | Juno Shin | Executive Producer |
| Production | Julien Vig | Producer |
| Art | 天野英 | Original Series Design |
| Visual Effects | 天野英 | Character Designer |
| Writing | クオンタム | Novel |
