The Demon Girl Next Door

is a Japanese four-panel manga series by Izumi Itō, serialized in Houbunsha's seinen manga magazine Manga Time Kirara Carat since 2014. An anime adaptation by J.C.Staff premiered on July 11, 2019.

Plot
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.

Other Sources

 * Manga
 * Anime
 * Anime
 * Anime