https://www.mangago.me/read-manga/the_broken_ring_this_marriage_will_fail_anyway/ - historical romance with smut
https://www.mangago.me/read-manga/marriage_of_convenience_scylla_scans/ - also both smut and historical romance
https://www.mangago.me/read-manga/honey_i_m_going_on_strike/ - It's not smut, but it has some spicy scenes; historical romance
Here you go dear, enjoy!
https://www.mangago.me/home/mangalist/1604174/
Some really good straight smut or just some really good historical manhwa reccomdations