The Water Dragon's Bride, Vol. 4 by Rei Toma

Spoilers ahead for the first three!

The continuing adventures of Asahi in another world, where she has ended up the priestess of the water dragon/god -- and is aware, as people of the world are not, that the gods don't care about people. Show some signs of weakness from episodic nature.

The water dragon stays with Asahi for a time and mimics some human actions, making her aware how non-human he is. Still, later, she insists on a trip. Events include a fair, an item of glass, the emperor's ill health, a fire, a discussion of sacrifice, and more.