Iijima adjusts to her new surroundings in the past, determined to locate the one who can harness the power of her advanced blade. As replinoid threats from her dystopian future start to infiltrate the present, she realizes time is running short to avert catastrophe. Through a series of intense trials, she evaluates promising candidates and prepares them for the battles ahead. Her quest takes a pivotal turn when she glimpses the potential in an unlikely individual.