Hajimari no Ryuu to Owari no Ryuu

A 1-volume collection of short stories set in the same world, spanning centuries.
Story 1: Three people cross paths, united by a flood and a dragon. A man who lost his village. An old man who lost his child. A young woman who lost her people.
Story 2: The king is ill. In their quest to find a cure, a priest and his band of soldiers enter barbarian territory. But the herb they need belongs to the dragons.
Story 3: Dragonswood is home to dragons and the people who care for them. When a mage and his dragon are captured, however, war looms ever closer.
Story 4: After a ritual gone wrong, a dry spell hits a village once abundant in rain. The arrival of a rainmaker promises salvation, but first he must get to the bottom of a well-kept secret.