Kigen-tsuki Koujo no Hazu ga, Umaku Yari Sugite Shimatta You desu

The girl I encountered in town, my spitting image, turned out to be a runaway princess?! Through a bizarre turn of events, the village girl Freya is forced to live in the royal palace as a stand-in for the princess who fled. Exposure means certain death! Desperate to protect herself, Freya plays the role of the princess, only to witness the harsh reality of the princess's existence: a neglectful emperor father, an apathetic fiancé, and malicious maids. "To get the princess to return, I have to fix this environment!" Freya resolves, using her natural grit and optimism to defy the scorn of those who see her as an "incompetent princess"!

(Source: Sorajima, translated)