Here are some recommendations for non-clearwater novels featuring male protagonists as royal princes:
1. "妻心如故" by 霧矢翊: This novel tells the story of a seemingly cold and aloof prince who secretly harbors a twisted personality. The only face he can recognize is that of the female protagonist, whom he saved when she was five years old. The female protagonist is portrayed as naive and sweet, but not actually foolish or innocent. The novel focuses on their unique and influential relationship.
2. "阿蘿" by 第十二只兔: This is a story about a simple-minded and innocent female protagonist and a cunning and ruthless prince. Initially, the male protagonist sees the female protagonist as a plaything, but eventually, their relationship evolves into a familial bond. The female protagonist is portrayed as childlike but not mentally unstable, and the male protagonist's outward playfulness hides a cruel nature. The novel is recommended for its unique and captivating plot.
Please note that these recommendations are based on the provided search results and may not be exhaustive.