Earth in 2050

What will the earth be like in 2050? Foreign demons invade the earth, restrict technology, guns cannot be used, and return to the primitive era of swords and bows. God-level blacksmith, terrifying monster. "Is this the wife from the previous life?" Alas, I didn't protect them well enough in the last life. . . This time, I must create my own empire, "Daughter... Daughter?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.