Female lead disguises as a man
https://www.mangago.me/read-manga/the_prince_of_myeolyeong/
https://www.mangago.me/read-manga/a_bad_example_of_a_perfect_curse/
It’s a classic (≧∀≦) https://www.mangago.me/read-manga/basara/
https://www.mangago.me/read-manga/finding_camellia/
Female lead disguises as a man