Best Friends Wear Books Together to Train Royal Successors

While celebrating their best friend's first place in the city's martial arts championship, they were knocked unconscious by an out-of-control mixer truck and both traveled through the novel of their best friend Duan Geng. Zhou Wanyu is the unpopular princess, and Lin Yue is the maid. The system requires that three princes and one prince be captured, and one of them be selected to assist the superior, so that the people can live and work in peace and contentment, and there will be no more smoke for hundreds of miles on the land. Guide to avoid pitfalls: Two male protagonists + two female protagonists, a CP mess! Everyone is evil! Everyone is evil! Everyone is evil! (People have no choice but to stay in the harem)