In a mystical and ancient world, you and Matsumi have to survive in a dangerous and treacherous world. As time goes by, the two of you find yourselves thrown together and having to work together to overcome the obstacles that you face. As you work together, you find yourself fascinated by her skills, all while learning to rely on and trust one another. As the story progresses, the two of you begin to develop a unique and special bond, all while facing greater and greater challenges.