Responses
https://www.mangago.me/read-manga/i_picked_up_the_second_male_lead_after_the_ending/
Maybe this is the one
YEAHH THANK U
that one historical shoujo manhwa where blonde fl is transmigrated(?) into another red haired fls story and makes moves on the cold black haired duke who was in love with the og fl, but gets rejected yet stays persistent in smothering him in her affection and then he finally yields but he's the cold duke so he can't reallyyy yield so miscommunication occurs and she get kidnapped and he rescues her and they somehow end up in the og fls castle and political tension goes crazy. Oh and she's from a really peaceful country too so that's that