Ashita no Kyouko-san

A demon world leader arrives in the modern human world with only his assistant, aiming to conquer it. His efforts are met with confusion, as many mistake him for a cosplayer. Complicating matters further is a severe economic downturn in the demon world, leaving him with limited resources. He must battle the human world's Hero, Ichikawa Kyouko, a strong and attractive young woman who became the chosen one after picking up a giant sword.