Ems<3

https://www.mangago.zone/read-manga/the_trapped_beast/
( Princes of enemy countries)

https://www.mangago.zone/read-manga/mute_uncle/

Not royalty but forbidden love:
https://www.mangago.zone/read-manga/coyote_zariya_ranmaru/
Royalty and forbidden love:
https://www.mangago.zone/read-manga/ookami_wa_hana_no_kaori/
I think this also counts:
https://www.mangago.zone/read-manga/to_be_or_not_to_be/
This is forbidden love and royalty but they don't have any chemistry together. I couldn't continue it even if I wanted to because the plot is really not my type:
https://www.mangago.zone/read-manga/spinel_baekji/
Historical, royalty. This was good and the art is pretty af:
https://www.mangago.zone/read-manga/shikabane_to_hanayome/

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