My Girlfriend is an Alien : It's played for laughs, but he's hot and she's highly attracted to him and makes it very clear. Then things happen and feelings grow. He's the sexy one, she's more quirky.
So Wayree: The guy is in lust for a good chunk of the story and there's intercourse (dubious content) before he gets to know her.
Kor Kerd Mai Klai Klai Ter : She's attracted to her son's friend who comes on to her, but fights the attraction quite succesfully before figuring out he's more than meets the eye.
Plerng Chimplee : Historical, he wants her at first because she's hot and dances well.
Mia Archeep : I personally only felt lust in this till the end. Never quite felt the love, just strong physical attraction.
It's Okay, That's Love : The chemistry and sexual tension are off the charts. Clearly and explicitly starts off like that for both of them. But she doesn't dress sexy.
Discovery of Romance : I feel like it fits here.
Last Cinderella : He's sexy, she's attracted. Very clean show, although a one night stand is strongly implied.