They met many difficulties, but they still ended up together. Any recommendations? In an ancient novel, the female protagonist seems to have gone to steal the royal tomb. After meeting the male protagonist, they went through many hardships together. Can they be together in the end?

The female protagonist seemed to have gone to rob the royal tomb and met the male protagonist. After that, they met several times and didn't know each other's names. The female protagonist was the male protagonist's fiancée, but the male protagonist didn't know that the male protagonist had a fiancée in the past, but they were all taken care of by the male protagonist's men. The male protagonist didn't know that the female protagonist was the woman who robbed the royal tomb. The betrothal gifts were all black things. Later, the female protagonist used a pigeon or something to ask the male protagonist when they would meet at the same place. However, one of the male protagonist's female subordinates changed the time (like changing today to tomorrow and tomorrow to the day after tomorrow, delaying it by a day). Please help me find this book. I can remember the plot but I can't remember the title and the characters.