The premise is a fantasy in a couple senses of the word: For one thing, it's an isekai—our protagonist is summoned to another world by magical means. For another, the person doing the summoning is a voluptuous queen who wants a prince consort to continue her bloodline.
You think you know where that's going, right?
What this story actually is is a rather interesting political drama in a magical setting.
Queen Aura is working to rebuild her monarchy, the country of Capua, following years of war (the same war also being the reason there's no native-born marriage prospect she's willing to entertain). She's a savvy political operator—she has to be, since careful selection of whom she trusts and what responsibilities to entrust them with is how she made it this far in the first place. But she's not power-hungry—rather, she's trying to protect a delicate peace and budding security that her subjects went too long without.
The new prince consort, Zenjiro, brings with him a bunch of items from Earth, several of which set up consequences for the technological curve of his new home. Some are creature comforts (hydroelectricity! air conditioning!), while others are things he rightly guesses will be valuable there even if taken for granted here.
The best part is watching Aura and Zenjiro navigate their work and their lives as the country's monarch and consort. Despite the series's title, Zenjiro does not simply loaf all day; he engages in the work—including diplomatic work—that is expected for his position. Moreover, Aura and Zenjiro work as a team: she brings experience and authority, while he brings both the novel perspective of a foreigner and the experiences of his life on Earth. They trust each other and work together on managing the statecraft that occupies their working time.
And that very much is how Aura and Zenjiro are presented. They are each doing their share of the work, and accordingly get comparable amounts of on-panel time. You might expect the story to mainly focus on Zenjiro, and he probably does get more panels than Aura as the audience-viewpoint character, but she's not a background character by any stretch—she is very much in an active, foreground player in this story.
It's lighter in tone than a lot of western political-intrigue stories from the last couple decades (this is not an ESH kind of story like “Game of Thrones”), but it is also not a comedy. It's a fantasy, but it approaches its setting and characters seriously.
I'm really enjoying this story and I'm looking forward to reading more of it.