Qin Wan, a brilliant female coroner living under a false identity to clear her family's name, finds an unlikely ally in Yan Chi, the Crown Prince of King Rui. Their relationship is often described as "healthy" and "grown-up," where loyalty is paramount.

In Coroner's Diary , the relationship between Qin Wan (played by Li Landi) and Yan Chi (played by Ao Ruipeng) is built on mutual respect and a shared sense of justice. Unlike many typical "sugar-coated" romances, their bond develops through the high-stakes world of investigative forensics and palace politics.

Fans frequently highlight scenes such as the "New Year kiss" and the "cold room confession" as pivotal turning points where their professional partnership transforms into deep affection.