Time Travel: Happy Marriage

She was originally the most powerful female agent in the 22nd century. She accidentally traveled to ancient times and became the regent's unmarried wife. On the day of the wedding, the regent closed the door and refused to accept the bride. The heroine stayed on the spot and Li Shu left gracefully. He was a lowly bodyguard who knew he was not good enough for the princess, so he silently guarded the princess [waistcoat + secret love]