When yuko yoshida wakes up one morning to discover that she's sprouted horns and a tail, she learns something that her mother has been meaning to tell her. You know that battle between the light and dark that's been going on since the dawn of time? Well, yuko's family are the bad guys. So now, yuko has to defeat a local magical girl to win back some of her family's vanquished power so they can afford to go to the all you can eat pancake restaurant. And, of course, it turns out that the magical girl goes to yuko's school, but momo's really nice and keeps rescuing yuko, which is pretty embarrassing and leaves yuko rather conflicted... But... All you can eat pancakes? Sometimes you're damned if you do and damned if you don't when you're the demon girl next door!