The Sand Princess.

Kotchanipa, a struggling college student, is willing to fulfill any task asked by Jirapas as she will get paid. When Ji gets her friend Rin pregnant, he asks her to raise his baby girl Moji. Changes happen when she accidentally meets Ji's brother Kirakorn. Ki wants to adopt Moji and asks her to marry him. Later, Ji confesses his feelings to her while she starts to develop some feelings for Ki.