One day, a young lady with one of Japan's greatest fortunes dies after losing her temper with an aggressor she encountered during a ranked gaming match, and is reborn in a fantasy other world. She arrives in "Mura Village," a rural area that has friendly relations with the demon tribe, and uses a number of cheat techniques that she was able to use as a result of her reincarnation into another world to beat them up. Unsatisfied with her medieval level of civilization, the young lady hears that the Demon King, who resides in a nearby dungeon, is hoarding the treasures he has acquired through trade with humans and decides to strike at him.