Yearning To Stop The Sunset At The Horizon

This drama is about the Crown Princess of a country. She was asked to go for a "holiday" in Bangkok before returning to her country to serve the King, her father. But what was hidden from her is that the King is in danger (someone tried to assassinate him) so to protect the Crown Princess, he kept her hidden in Bangkok until the power struggles are settled. But being in Bangkok, she has to keep her identity hidden so they hire a very skilled bodyguard to protect her. He doesn't know her real identity - he has always believed that she is a millionaire's daughter. This story revolves around them and the question is: can a love between a princess and a commoner be possible?