Recruiting a Consort, also known as A Promise to You. A scheming, aloof princess versus a low-key, brilliant prince consort.
Synopsis: A weak-looking pretty boy who acts recklessly is unexpectedly chosen as the prince consort. Faced with the aloof and imposing Ninth Princess, he has no choice but to back down again and again... As a woman serving as the princess's consort, how will she claim a place for herself amid the stormy court? And what choice will she make when faced with supreme power...?
I seem to have seen the name of the protagonist of this article in a post bar. It may be similar.
Looks good. Looking forward to updating soon.