As Earth-san leveled up, everyday life was dyed into fantasy.
Dungeons and monsters appeared, and the karma status system was released for many creatures.
A small-build girl, Hitsujiya Meiko who welcomes it likes other creature from all over the world that day, is swallowed by the appearance of a mana production device, a dungeon.
Sometimes she saves people around the world, sometimes guides them, sometimes makes them enthusiastic, sometimes makes them misunderstood. This is a famous story about a girl who has almost no intention of concealing her activity.