The Empress of Ayodhaya

Jinda, daughter of the lord of Lopburi, and excellent in appearance and intellect, was born to the highest of destinies. It is her great duty to seize the throne from Phra Chairacha, the warrior king of Ayodhaya, and return it to her own Lavo dynasty line.
Jinda must therefore offer herself as one of four royal concubines, inevitably separating her from her lover Wamon. Her journey has her face the other three royal concubines of foreign origin, Jittrawadi, La-ongkham, and Tanyong, each vying for the position of queen consort.
(source : mydramalist)