Bonded Hearts(2010)

Suea and Mook had known each other since young age, they grew up together and had unsaid promise of undyingly loving each other but their separation was inevitable since Mook's father had to move abroad for his career. They eventually got together because Mook had to return to Thailand for a funeral, and it was then that they met after almost 10 years. Their happiness wasn't easily earned, there were many people wanting to take advantage of Suea's fortune, and had to get Mook out of the way.