Ryuujin-sama to Amagoi no Miko

This is a world ruled by eight million gods. One day, the shrine maiden Kagura Miyabi is led by a mysterious crow to a large tree.There she finds Yakumo, a beautiful white dragon god. As soon as he sees Miyabi, he tells her: "I've been waiting for you." After their fateful encounter, Miyabi and Yakumo set out on a journey to save all the gods in the country. What awaits them there?

(Source: Kadokawa, translated)