The first 2 chapter kinda remind me with 后宮のオメガ / Kōkyū no Omega.
Probably bcz the same type of tropes with political marriage, skin color and meet when one of them still a teen. The couple from kokyu got separated too
Sorry for the late reply. It's this one
https://www.mangago.me/read-manga/kouguu_no_omega/
I think i type the romaji wrong










I think I like the drawing for s1 more, it feels more rough, more like a real human.
but meh who am I to complain (=・ω・=) I still read it anyway