This is a story after Gods died. New legends created by humans...... Demons who once hostile to the gods. The demons are sealed deep inside the temple, The seal was maintained by the shrine maid 's blood. However, the shrine maiden's blood is thin and the seal is weak. Sara, a shrine maiden, realizes that it is difficult to maintain a seal. And those who solve the weak seal and gain the power of the demon. Sara goes on a journey to protect the seal from them. This is a legendary story that is later called a holy war.