Setsu, a low-ranking adventurer in the rural town of Ragbart, once died from overwork at a harsh company where unpaid overtime and unreasonable demands were the norm. Now transported to a new world, he’s determined to live as an efficiency enthusiast! Enjoying a carefree life, he dedicates himself to the odd job of “exterminating slimes clogging drains.” But his unique skills soon catch the attention of powerful figures, including the skilled female swordsman Lilia.