Hiroshi Yamada, a 42-year-old dull office worker, was suddenly sent to another world, after being chosen to be summoned as a hero that should have been limited to young people. As a promised development in the summoning, Hiroshi was thrown into another world that is teeming with monsters, with three strongest skills given by God, "One-shot Kill," "Magic Creation," and the ultimate physical strengthening skill, "Transcendent." It was thought that Hiroshi makes full use of the skills and defeats one monster after another! but, with his clumsiness, he can't control the power of the skills and goes on a rampage! This is the story of Hiroshi, livelily exploring another world at his own pace, through which, he meets an adorable fairy and a middle-aged muscular warrior, and fights over enemies whose from-time-to-time atrociousness causes people the trouble.