Korean drama That Fool that stars Hwang Jungmin and Kim Ahjoong. She was a super star and was in a serious relationship with a guy, but because the guy is chaebol they have to hide their relationship. Enter ML who somehow gets roped into a scandal with her, and they do contract marriage or marriage for convenience.
And maybe that thai drama Leh Ratree, where the girl had to be married or live with ML and concieve a child for his family, yet she was in love or was in a serious relationship with her childhood sweetheart.
Lastly, try the movie My Little Bride