Ryuujin-sama no Oyome-sama

Married to the Dragon God, 龍神大人的新婚妻, 龍神様にお嫁入り, 龍神様にお嫁入り穢れはカラダで祓うもの, 龍神様のお嫁さま, 용신님께 시집갑니다

*Note: The series isn't technically divided into sequel or prequel. They are still published under the same title. Both are repackaged under new title.*

Tsuwabuki, a lion-dog, is forced by his sister to take on the sacrificial role of healing a weakened god. He ends up becoming the dragon god's bride, and...?!

Official English on Book Walker