i watched this drama a couple of years ago so i don't rem the plot too well but:
ML is a tyrant and travels to modern era and he doesn't want to cut his hair because hair was important in ancient Chinese culture. The 2nd kinda ML also travels to modern era and was the enemy of ML in historical times but they both started to live in FL's modern house & kinda chilled there. The ending is sad because it's revealed that he has to go back to his country since he made the decision to become a good king. It's also revealed by historians that he never took on a queen and instead he took with him from modern times to ancient times this object(?) that was given to him by the FL . This info was on the news and FL was commenting how sad it was he didn't have a queen(?) but thought the object is kinda familiar (?). But in the end, the FL forgot about the ML and her time with him was all just a forgotten dream(?)
