Please recommend a novel in which the male and female protagonists are childhood sweethearts. The male protagonist has liked the female protagonist since he was young. What is the age of the female protagonist? Both of them were outstanding.

I recommend "A Prince's Long Road to Courting His Wife". This ancient romance novel tells the story of a cynical playboy prince who boasted about having countless women, but he fell for his childhood friend who he grew up with without knowing it. After breaking the woman's heart, he suddenly realized that it was a long way to chase his wife. The two main characters are both outstanding, and the male and female leads are childhood sweethearts! I hope you like my recommendation. Muah ~