The Story of the Kitsune and the Demon is a series made by masa. It has wrongfully been referred to as The Onibi series in the western fandom. It is a very complicated story, but what we can say as of now is very little. Ryou kills Akari in a show at her theatre because business, but she curses Ryou and that marks her fate. Then Akari's brother, Kanishiro, kidnaps Mai and forces her to eat human meat. After that, she eats her parents (all while she's kind of possessed). After that, she goes crazy and starts to devour more and more people. The finale of the series is still blurry and not known.