Maihime, the best swordswoman in the castle of Ikoma in the Land of Miyo, sets off on an adventurous journey to cure her father, who has been cursed by the demon lord who rules the world of darkness and has turned into a komainu-like monster! Accompanied by the timid and timid Rokubei, who has a phobia of people and blushes, Maihime heads for Mount Kongo, said to be the home of a dark ascetic who possesses divine powers to overcome demons and evil gods. However, as Maihime and her friends approach the mountain pass, they are already attacked by demons!