After sacrificing himself to save a cat, middle-aged salaryman Eizo is offered a second life as a blacksmith in another world. With his overpowered smithing skills, Eizo forges weapons that are superior to anything his new world has ever seen!

After saving an injured cat, middle-aged, overworked programmer Eizo is rewarded with a quiet life as a blacksmith in another world. His newfound skills turn out to be god-tier, and the weapons he makes are strong enough to turn the tides of war.