Marcus, an ancient demon Xavier once sealed away, has awakened — and he wants Ella's witch blood to unlock his full power.
With danger closing in, Xavier makes a choice: he reveals the Gothic castle he's kept hidden for a thousand years, and offers Ella a home.
New episodes every [schedule]. ⏱ 1–2 min/ep | 📺 35 episodes total #OathWithDemon #DarkFantasy #AnimeDrama #DemonLord
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