In a past life, they were the joyfully married kings of a prosperous kingdom. Living a sweet life with a sweet end, they finish their first lives on a happy note, so sure that they would meet each other in their next life. Thankfully, they were right! Unfortunate, one thousand and thirty five years have already passed by the time they meet once more. Still amateur idol trainees who don't take life seriously yet, Minho and Jisung not only hold secrets from their past lives, but from their current ones as well. Unaware that they were great lovers in their past lives, there is a long road ahead of them if they want to figure out what this strange pulling at their chest is whenever they see each other. Promise Sequel

Many years ago, the Western Lee Kingdom was promised a bride for the then infant, Prince Lee Minho. The King and Queen of the Eastern Han Kingdom were sure an arranged marriage was the best way to stop upcoming wars with the Lee Kingdom, and gain allies when battles with the other provinces occurred. However, the couple only had one child, a boy, before they mysteriously both died. Fifteen years later, wars loom even closer, inching towards the Western Kingdom, and, as a last resort, Prince Lee Minho is shoved into a strange, never-before-seen marriage with Crown Prince Han Jisung. Clearly, there will be many problems with this arrangment, the major problem for the princes being that they don't want anything to do with each other. At all. Is it possible, if they push everything else aside, these two princes could fall in love? And if they did, would it be enough to save their marriage, and save both their kingdoms?