Dai go Koujo no Nariagari! Suterare Koujo, Koutei ni Narimasu

On the outskirts of the imperial palace of the great power, the Tserbakia Empire, lies a "ghost mansion" - the Palace of Verdure. In this dilapidated and rundown mansion lives Euselica, the fifth princess, abandoned by her father, the emperor. With no backing after her mother's death, she lives frugally and works hard to manage the estate her mother left her. One day, the emperor suddenly announces that a competition will be held to select the crown prince. Euselica is surprised, but thinking that if she becomes emperor, she can get revenge on her father who had neglected them, she decides to run for the competition! The condition is to "build up wealth and enrich the country within three years." The days of building wealth through military force are over. With this in mind, Euselica sets her sights on human resource development and decides to put a "certain plan" into action... The story of an abandoned princess's dramatic rise to power begins here!

(Source: AlphaPolis, translated)