The Demon King has arrived in the modern human world, bringing along only his loyal assistant to begin his grand plan of conquest! Unfortunately, things don’t go quite as planned — most people just assume he’s a cosplayer. To make matters worse, the demon world is going through its worst recession in 500 years, leaving him severely underfunded. Standing in his way is humanity’s chosen Hero, Ichikawa Kyouko — a strikingly beautiful and strong-willed modern girl who accidentally picked up the legendary sword that marks her as the destined warrior.