I recommend novels where the male protagonist is much younger than the female protagonist, the male protagonist is more familiar with the female protagonist than the female protagonist, and the male protagonist has liked the female protagonist since childhood.

Answer 1

I recommend 'Wear It Quickly: Villain Prince Charming Prays to Let Go' to you. Although it was a sci-fi space-time travel novel, it also met your requirements for the male protagonist to be much younger than the female protagonist, for the male protagonist to mature early, and for him to like the female protagonist from a very young age. The female protagonist in the story was a vicious female supporting character who was cannon fodder. However, after being bound by the system, she began to travel through various planes, attacking the villains, and occasionally breaking up the couple. The male supporting character who appeared many times also vigorously matched the male and female protagonists. I hope you like my recommendation, Mwah ~😗