The Expelled Middle-Aged Blacksmith, Becomes a Legendary Famous Craftsman for Some Reason: The Kids Who He Once Made Some Toy Weapons for Have All Become Heroes Manga

Dereto, a middle-aged blacksmith, is expelled from his guild and leaves his small town for the royal capital. There, he learns that a toy weapon he once made for a girl has become a legendary weapon, and that she has grown into a national hero. His fortunes change as he is celebrated for crafting the weapon. Dereto also unexpectedly encounters the guild members who cast him out and eventually takes them on as his apprentices.