Tras perder a su padre y con deudas, Shun y sus amigos buscan ganar el 'Campeonato Xaxerion' en una cafetería de deportes electrónicos para resolver sus problemas.

A hoard of vicious demons known as "Oni" come knocking on her doorstep, threatening the lives of everyone in the Kingdom, they are saved by a lone traveler named Kibitsu Mikoto who slays these monsters with a mysterious "Peach Eye."