Yuuko Yoshida wakes up one morning with demon horns and a tail and learns she's the last heir of the Dark Clan, cursed generations ago into poverty by the rival Light Clan. To lift the curse and restore her family's fortune, she's supposed to defeat the local magical girl, Momo Chiyoda, except Yuuko's demon powers turn out to be almost nonexistent, and Momo would rather help her out than fight. The four-panel manga follows their lopsided rivalry-turned-friendship, along with the fox demon Lico and the misfortune-cursed magical girl Mikan Hinatsuki.