One day Haruhiro comes to his senses in an unfamiliar cave. He—along with the people who ended up with him—remembers nothing about himself besides a name. When the characters leave the cave, they are taken to an unfamiliar city and offered to become soldiers fighting monsters that surround the city. Since there aren’t many other ways to make money in the city, the heroes have to agree. However, the members of Haruhiro’s group are so weak that they can barely even pay for lodging and food.