Of the Utmost Importance [rina au]

Duke Richard Bowen is at odds with himself. After being confronted with an unpleasant truth (his mother's adulterous behavior within the very walls of the estate) and his fiance since the age of five reminds him of their impending nuptials, he coasts. He finds himself on a writing retreat of his own design skipping out on duties as duke and Fiancé to Nini Salazar Roberts for the summer. He comes home to his entire world changing. Baroness Genevive Porter arrives in town and the world shifts on its axis again.

Or the royal (kinda) hsmtmts/rina au no one asked for.