The premise centers on onmyoji Mao, cursed for 900 years by the cat demon Byoki, partnering with middle-schooler Nanoka Kiba to unravel curses, shikigami, yokai attacks, cults like Shorinkyo, and ancient rituals such as kodoku and the Taizanfukun spell. Episode plots draw directly from Japanese folklore with cursed swords, fire-wielding onmyoji battles, water sorcery, and body horror tied to lifespan manipulation, keeping the narrative focused on revenge, curses, and supernatural mysteries without any identity politics or social justice framing. Casting remains fully consistent with the historical and cultural setting through an all-Japanese voice cast, including Yuki Kaji as Mao and Natsumi Kawaida as Nanoka, with no established-character race or gender swaps.

Creator intent and audience reception center exclusively on dark fantasy horror, romance, and folklore elements such as the Goko Clan and Undersea Shrine, producing zero mentions of activist themes, DEI mandates, or backlash over messaging. This approach preserves the story's entertainment value as pure onmyodo fantasy.