The FL isn't brainwashing the ML (though she's not pushing him away either...) but he is under a love spell. There's a plot twist involved that's actually surprising and interesting but the premise around the love spell is just yikes to me. If you don't mind the romantic non-con basically you'll probably enjoy this. The FL is on the dumber side, typical happy-go-lucky ditzy girl. The novel has a happy ending idk about the webtoon.
Why are you doing this, my Duke!? Webtoon