RISING OF THE SHIELD HERO GN VOL 13 (C: 0-1-2) ONE PEACE BOOKS (W/A/CA) Aneko Yusagi The mysterious monsters that Naofumi and crew were asked to take care of can be traced back to the legendary beast known as the Spirit Tortoise. Meanwhile, the other 3 heroes have disappeared. Why? And what will the Spirit Tortoise do next?!.