Dansou Oujo no Akusai Keikaku: Dannasama ga Zenzen Rikon ni Oujite Kuremasen

Eddie has always lived as a prince, hiding her true gender identity. However, when her aide Harold tries to treat her injuries, he strips her and reveals to those around her that she is a woman. Eddie prepares herself for severe punishment, but the king commands her to become Harold's wife!?

This must be an unwanted marriage for Harold! Thinking this, Eddie becomes a bad wife and plots to get a divorce... but contrary to her wishes, she begins a fulfilling married life where Harold dotes on her...!!

(Source: Futabasha, translated)