The story
She worships the Dragon Lord and mocks her own fiance.
Iso rules the Hidden Dragon Dominion and goes into hiding as an ordinary man to find out who murdered his mother, the Saintess Esara. Living in Silvermoon Castle, he honours an old betrothal and becomes engaged to Sera, heiress to the saintess line, who has spent years adoring a mythical figure from a distance and finds her unremarkable betrothed a disappointment. She belittles him regularly. Meanwhile Cardinal Taren wants the saintess power and has quietly hired eight renowned Dragon Slayers.