The King 2 Hearts

This drama shows the differences between north and South Korea, set in the modern times, South Korea is under monarchy. The king and queen have died making their elder son the king. The younger son is sent to military to serve his one-year. There he works with his team, some of them being from North Korea, to test of Korea as a whole country could participate in international games. He falls in love with his teammate, a really strong woman from North Korea and soon marries her, showing the newly found unity between the two countries. What is unexpected is the death of his older brother and the younger brother being announced as King. Overnight his life changes as he, his wife and the rest of the royal family work hard to find the murderer who would do anything to prevent North and South Korea to reunite.