I recommend "The King of the Net System" and "The King of the Net: Early Summer" to you."The King of the Net: Early Summer" is the one in which the female protagonist is engaged to Echizen Ryuma. The protagonist of this novel, Aizuki Yuki, was the child that the Aizuki family did not want. She was also Chuxia Echizen (Ryuuma Echizen's younger sister). In this novel, she was engaged to Ryoma Echizen, and the two of them had complicated emotional entanglements. If you want to know more about the novel recommendations of the tennis prince, you can send me a private message.πI hope you like my recommendation.π