The same description as book 24963: A man named Haruhiro wakes up in an unfamiliar cave. He—and everyone else who ends up with him—remembers nothing about themselves except their name. When the characters leave the cave, they are taken to an unknown city and offered to become soldiers fighting the monsters that surround the city. Since there are not many other ways to earn money, 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.