Iseisha no Neya: Yajuu Koutei no Owaranai Mitsuya

"Why am I being pinned down?" "I wanted to hold you." Bridget, the eccentric king of MacArdle, is a great ruler who rebuilt her country with her exceptional talent after the death of the previous king, yet she is a recluse who is rarely seen. But her true identity is that of a queen who cross-dresses and seduces the ladies-in-waiting in the royal castle with her beautiful appearance. Then, Emperor Bless of the powerful nation of Promqvist comes to Bridget. The day after a reluctant meeting, Bridget goes to a festival in her women's clothing to let loose, only to encounter Bless and have her true identity discovered. What's more, for some reason, Bless then persistently pressures her to marry him. Bridget agrees to the political marriage, but from the first day onwards, Bless visits her bedchamber day and night, not letting her sleep, and he is incredibly virile? A fierce night (battle) between two rulers begins between the cross-dressing queen and the ruthless emperor! (Source: Kadokawa, translated)