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!

Shiina, a freshman in college, lives a cozy life in Niigata Prefecture while dating her coppersmith boyfriend, Shuu. The one thing she's not ready for is Shuu's sudden proposal! Barely out of high school, is she ready for married life?

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.