Rouge was originally an overseas student in the 21st century who fell into a coma due to a plane crash. When he woke up, he found that he had fallen into an ancient princess's palace and was mistaken for the little princess who disappeared a few years ago. Because of his modern sense of specialness, he was favored by the current crown prince, the second prince and others. However, the foreign prince and his own prince had the same aspirations as Rouge, fighting overtly and secretly, which triggered a love story between a woman and a man.