The baroness Katena Ironwill, who regained the memories of her past life as a Japanese person. She remembers that she lost her life with the lingering wish of wanting to create her "beloved Japanese sword." Upon learning that the Ironwill family has nurtured blacksmiths for generations, Katena realizes she can finally fulfill her long-held dream of sword-making and decides to pursue the path of a swordsmith. She quickly becomes an apprentice in a workshop, learning the craft and diligently working on sword-making for several years―― finally, the Japanese sword is completed. At that moment, a "goddess" descends before Katena!? The Japanese sword, which does not exist in this world, catches the goddess's attention and is unexpectedly recognized as a divine artifact. Furthermore, she receives immense magical power as a divine child and is tasked with opposing the "demon god" that threatens this world...?! "I just wanted to make a Japanese sword!" To protect her peaceful swordsmith life―― she will cut down any enemies that get in her way and the unreasonable challenges with her supreme magical power and Japanese sword!! The cheat-filled fantasy of a swordsmith lady begins!