The bloodlines of "Oni" and "Momotaro" have been passed down among certain humans for generations. Long ago, the Oni, aware of their own ferocity, lived in seclusion. However, their peace was shattered by an invasion led by Momotaro. Over thousands of years, these two factions formed the "Momotaro Agency" and the "Oni Agency," respectively, and have been locked in conflict ever since. The protagonist, Shiki Ichinose, suddenly learns of his Oni lineage following an unexpected attack by Momotaro. This revelation sets Shiki on a path to discover the destiny that lies within his blood — a meeting with the Oni dwelling within him.
| Actor | Role |
|---|---|
 Alan AbeShiki Ichinose | Shiki Ichinose |
 Yuta TachibanaNaito Mudano | Naito Mudano |
 Ryoya TakahashiJin Kougasaki | Jin Kougasaki |
 Ryono KusachiIkari Yaoroshi | Ikari Yaoroshi |
 Ryōta HironoJuji Yusurube | Juji Yusurube |
| YYuuna WatayaHomare Byobugaura | Homare Byobugaura |
| SSoushi HaitsukaRokuro Kiriyama | Rokuro Kiriyama |
| SShio YamazakiKuina Sazanami | Kuina Sazanami |
| RRyo TaguchiKyouya Oiranzaka | Kyouya Oiranzaka |
| SShintaro TakemuraTsuyoshi Ichinose | Tsuyoshi Ichinose |
| 岡岡田六花芽衣（Wキャスト） | 芽衣（Wキャスト） |
| 岩岩本佳子芽衣（Wキャスト） | 芽衣（Wキャスト） |
 Ryo KitamuraTsubakiri Momomiya | Tsubakiri Momomiya |
 Moka IshikawaMomokusa Yomogi | Momokusa Yomogi |
 Masahide FunakiManaka Momobe | Manaka Momobe |
| KKenji MatsudaSamidare Momoya | Samidare Momoya |