Ame no Ouji to Hana no Nie

A nation remembers a legend of a prince who slays a calamity dragon and saves a girl destined for sacrifice. Five days prior to her wedding, the "bride" finds a wounded man named Jiu collapsed near a house. He seems to be hunted, so she offers him shelter in exchange for his help with a task. Their meeting alters the destiny of the dragon-inhabited land.