She - an imperial princess who traveled from ancient times to modern times for the sake of the country and the country, met him on the first day, and she fell in love with him at first sight.
He ----- a noble young man in modern society, met her by chance. When he saw her for the first time, he fell in love with her at first sight.
Due to family grudges, he was seriously injured in a battle and died soon after. In order to resurrect him, she sacrificed his thousand-year essence.
After waking up, he found that he was in an unknown country, but he had lost the ability to live in the original society. From then on, in order to find her and for him to survive in that world, he started from the bottom of that society, doing everything just for her and him.
