Do you know if there are any novels about the female protagonist and the male protagonist knowing each other since they were young?

Yes, the two novels,"The Remaining Oath" and "The Black-bellied Bamboo Horse's Little Green Plum," both told the story of the female protagonist and the male protagonist knowing each other since they were young. "The Remaining Oath" was a modern romance novel about urban life. It described the story of the male and female protagonists, who were cold and arrogant in the early stage and obedient to the female protagonist in the later stage."The Black-bellied Bamboo Horse's Little Green Plum" was a romantic youth-youth campus novel. The male protagonist was smart and black-bellied, while the female protagonist was smart and cute. It was a story about two childhood sweethearts who had a crush on each other. I hope you like this fairy's recommendation. Muah ~😗