Except for the devil part everything sounds similar. By chance is it Crimson Karma?
Aaaaa that's a really good guess but they didn't marry yet kkkk.. nope that ain't itt
ahhh i totally know which one you're talking about. i'll find it really quick and be back!
My Saviour
http://www.mangago.me/read-manga/the_emperor_s_companion/
is it this one?
Thank you so much omg
no problem!
Lord help me... Okay so in the beginning the FL suddenly was in a girl's body. And the situation was chaotic because there's like a devil that's trying to court her. The FL lost her memories it seems and forgot that She Had A Past With The ML (devil). And she was a very powerful saintess if im not wrong. She then used her powers to protect her people and passed out. That's the beginning. Then eventually they got married and she had to meet the white knights. She met the black knights instead and the black knights asked for a duel. She beat all of them. That's all i remembered. Thanks for reading and lord please gime the answer this time