Mae Krua Kon Mai (1987)

Lomdao was supposed to get married with Balam, but she refuses to because she has never seen him and she doesn't even know how he is. So she disguises herself and works under Balam's family as a servant by the name of Faidam. Balam becomes suspicious of her and later he discovers that she is Lomdao, the girl he was arranged to get married with. Slowly, the two fell in love with one another.