Hero Land is a world where you can meet the heroes and heroines you have been waiting for, created by the inventor girl "Ururu". Shimajiro and his friends were overexcited, but a bad robot appeared there and Hero Land was in big danger. Can Shimajiro and his friends work together to help?

Its central characters are a vampire girl named Miyu and her demonic companion Larva. Miyu is the daughter of both a human and a shinma (demon) and as such she was awakened as the guardian whose destiny is to hunt down all stray shinma and send them back to the darkness.