The boy who had lost his memory and had a blank mind woke up in a strange desert. But there is only a strange talking sword beside him. "Hey! Call me by my name! It's Luce!" And the flirty voice that occasionally sounded in my mind, "Haha, what are we going to do next?" And... "Hey! Don't forget about me! You hateful cold-faced man! Wait for me!" During the journey, we met occasionally, and it was inevitable to quarrel with the mysterious eldest lady. What will happen? The wonderful and grand journey of the boy and the sword is about to begin.