Maybe you'll like one of these:
https://www.mangago.me/read-manga/spinach_bouquet/
https://www.mangago.me/read-manga/sun_kissed_heartbeats/
https://www.mangago.me/read-manga/my_house_has_become_a_filming_location/
https://www.mangago.me/read-manga/gentle_forest/
https://www.mangago.me/read-manga/it_s_easy_to_fall_into_samcheonpo/
https://www.mangago.me/read-manga/bongchon_bride/
https://www.mangago.me/read-manga/farming_for_love/
https://www.mangago.me/read-manga/please_fix_my_heart/
https://www.mangago.me/read-manga/home_ep/ (not entirely in the countryside)
https://www.mangago.me/read-manga/mr_do_hoon_of_the_rose_mansion/

Give me more manhwa suggestions like the "our sunny days". Basically countryside living and romance.