Ruan Xiaofeng's Royal Love Quest.

A modern office worker is transported to the past as a noble princess, only to face disdain from everyone, including her cold husband, Prince Ling. After discovering she’s implicated in the death of Prince Ling’s mother, she uses creativity and wit to clear her name. Introducing murder mystery games to aid the investigation, she and Prince Ling team up to uncover the truth, forging an unexpected bond along the way.