A poor factory worker named Mairu accidentally got caught in a summoning event and was thrown into another world. Alone and helpless with no fighting power to dominate the world, he had no choice but to use his best skill to be a herb picker in a small village, far away from the capital and big cities.
As the flame of war between humans and demons grew larger, natural and man-made disasters continued to disturb the continent, including the small village where Mairu lived. Drought, famine, and plague – what could a lazy herb picker do to maintain his peaceful life?