Follow the story of Reiko, a little girl who has been raised from childhood to be the next sacrifice to the "Dragon God", in the hope that this mystical creature will agree to defeat the Demon King. However, instead of being terrifying as one might expect, the Dragon God turns out to be a large, timid reptile who is mainly vegetarian, refusing to consume the young girl! Faced with the threat posed to her village by demonic creatures, the determined Reiko decides to make difficulties for this Dragon, persuading him to lend her assistance.