Hitozuma Isekai Senshi Natsumi

Natsumi Takahata was just an ordinary housewife until the day she was overwhelmed by a suddenly appeared ball of light and summoned into the alternate world. According to a god of the world who summoned Natsumi, the world is currently facing the risk of collapse due to the demon lord who also came inter-worldly. Nothing but Natsumi's sword has a chance to defeat the demon lord. In order to get back to her original world, she takes the sword in her hands.