Iki Okure Reijou ga Ryouchi Keiei ni Honsou Shiteitara Tatena Oshi Kou ni Aisaremashita

Feena, the daughter of a baron, is struggling to manage her father's estate in place of her late father. She secretly pursues the talented young Duke Leonard, known as the "Duke of Reconstruction," looking up to him as a mentor in managing the territory, and to her surprise, he ends up visiting the barony! But if it's discovered that she's involved in managing the territory despite being a woman, she'll be in grave danger of being left behind! Feena tries her best to hide it, but... A love story that begins with admiration as she reforms the territory! (Source: Kadokawa, translated) Note: Includes two extra chapters.