Awakening her dormant abilities as a devil one day, Yuuko Yoshida aka Shadow Mistress Yuuko, is entrusted with the mission to defeat the Light clan's shrine maiden, a magical girl, by her ancestor Lilith. Yuuko meets magical girl Momo Chiyoda through her classmate Anri Sada, and challenges her to a duel, but loses quickly due to her lack of strength.

Since then, Yuuko has struggled with her role as a devil and her duel with Momo, and borrowed help from her regularly. However, by a strange coincidence, Yuuko also weakens Momo by taking away her power to cooperate in protecting the peace of Tama city.

[Source: MyAnimeList News]

Shamiko, AKA Shadow Mistress Yuko, aims to break the curse placed on her family by the Clan of Light. Along the way, she forms an unlikely allegiance with Momo, a rival from the Light Clan! They’ll need to work together to find another magical girl who’s gone mysteriously missing, and what's this? There’s a dangerous force lurking somewhere in the city, plus Shamiko’s mysterious father might be closer than she thinks?

[Source: Sentai Filmworks]