One of the main themes is probably self - discovery. The protagonist living as a prince would likely go through a journey of understanding their new identity and the responsibilities that come with it. Another theme could be power and influence. As a prince, they would be in a position of authority and would have to navigate the political and social aspects of that power.
One similar light novel could be 'Ascendance of a Bookworm'. It also has a unique protagonist in a different kind of world setting, with the main character having to adapt and strive in a new environment. Another one is 'That Time I Got Reincarnated as a Slime'. The main character is reborn in a different form and has to build their own 'kingdom' in a sense, much like the idea of living as a prince in the given novel.
Since I'm not familiar with this 'As Long As We Both Shall Live' novel, it's hard to tell its exact content. However, the title makes me think it might revolve around two characters and their journey together, maybe through different life challenges while remaining together for a long time, like a relationship - centered story.
It's a heartwarming story about finding love and simplicity in the countryside. The charm lies in its beautiful rural settings and the developing relationship between the characters.
It could be the main protagonists from the original work that the fanfiction is based on. For example, if it's a fanfic of a superhero story, it might be the superhero and their love interest.
It could imply that the love described in the fanfiction is eternal and remains youthful. Maybe it's about a love that defies time and age, always staying fresh and full of vitality.
The characters in the movie included the protagonist, Ye Liushan, the heroine, Bai Qingluo, the original member of the Dark Night, Bai, and the supporting actor, the butler of the old mansion, Lan Yu. The young butler was a genius, extremely capable, and was good friends with Lan Yanchu. The family members had been loyal to the Lan family for generations and finally got together with Yue Yue. The male supporting character was Shangguan Zhi, Shangguan Yuan's younger brother, Lan Yanchu's college roommate, the male supporting character was Yang Gao, Ye Liushan's fiancé, a rich second-generation heir who played around with Shangguan Yuan, the male supporting character was Banxia, and the female supporting character was Shangguan Yuan, a socialite from the Capital City. She was the object of Lan Yanchu's love and the sister of Lan Yanchu's good brother, Shangguan Zhi. The two of them liked each other and left Lan Yanchu for further studies.
'I'm Staying at My Prince Charming's Home' was written by Feng Jiu. It was a modern romance/urban novel.
[User recommendation: Gentle Luo had never thought that she could get herself a husband by playing games ~~]
Moreover, it was a top-grade one…
Not only was her figure and appearance top-notch, but her stubborn personality was also top-notch!
Lan Yanchu had never thought that he would get married. It wasn't until he met Bai Qing Luo that he realized that it wasn't that he didn't want to get married, but that he didn't want to marry anyone other than Bai Qing Luo!
Banxia thought that the little sister who came back would be hers, but she didn't expect her cousin to take her away? What happened to abstinence!
Ye Liushan secretly prepared the durian and waited…
I hope you will like this book.