Could you recommend a romance novel that described the relationship between the hostage prince and the princess?

I do. I recommend the ancient romance novel," The Marriage of a Time Traveler: The Princess Is Not to Be Trifled With." The story was about the female protagonist who was kidnapped by the enemy prince Tuoba Ke after she transmigrated to the Southern Qi Dynasty. During the escape chase, she found that she had unknowingly fallen in love with the kidnapper. In the end, the female protagonist successfully escaped from the kidnappers, but she always missed the days when she fought with Tuoba Ke and wondered if she had "Stockholm syndrome".

"Gone with the Clouds" was an ancient romance novel. It told the ordinary story of a grandfather and grandson who depended on each other in the mountains. I hope you like this fairy's recommendation. Muah ~😗

I recommend "The Daughter with Superpowers". It tells the story of an otaku who accidentally became his daughter's father and experienced a happy adventure with his daughter. The relationship between the male and female leads was intimate, and the plot was interesting. It was a touching and heartwarming novel. I hope you like my recommendation. Muah ~

"You're the One", a modern romance novel, may meet your needs. The male and female protagonists are very mature, and the relationship between childhood sweethearts is very deep.😋I hope you like this fairy's recommendation. Muah ~😗

Overall, their relationship is full of tension and unexpected developments. There are elements of sacrifice, protection, and forbidden love involved.

😋I recommend the Ugly Wife's Home Treasure to you. The male protagonist was devoted, the female protagonist was infatuated, childhood sweethearts, family affairs, ordinary daily life of raising a wife and children, and the type of relationship and romance between the male and female protagonists that met your needs. I hope you like my recommendation.😗

Based on the search results provided, there was no definite answer.

😋I recommend to you "The Enemy Ghost King", a Western fantasy novel. The male and female protagonists suddenly change their gender, which brings a lot of trouble and comedy. I hope you like this fairy's recommendation. Muah ~😗

" Li Chuan You Jiang " was a modern romance novel about urban life. It had a teacher-student plot. It told the story of childhood sweethearts becoming teacher-student, and then the teacher-student becoming lovers. If you like this kind of novel, you can consider this book. I hope you like this fairy's recommendation.😗😋

There were a few sibling romance novels: "Forbidden Love: Sister, Please Let Me Love You","There's a Southern Sheng in the North","The Emperor Farming for Me","Wear the Little Koi: Super Tempting After the Villain Becomes Evil","A Single Mother's Search for Love","99 Hours Before Marriage: The Temptation to Go Home","The Little Green Plum in His Heart","The Paranoid Bamboo Horse's Search for Love Story","Surrender and Fall","Big Wife, Little Wolfdog","After Rebirth, the Paranoid Big Boss Pretends to Be Good Again"," Bamboo Horse Has Been Pretending for a Long Time". I hope you like this fairy's recommendation. Muah ~😗