Kahogo na Shitsuji ga Watashi no Konkatsu wo Jamashite Kimasu!

Three years ago, a great disaster caused Countess Serena to lose her parents and leave her estate ravaged by famine. Although she has managed to rebuild her estate on a small scale, she is still poor, unable to pay her servants' wages, and struggling to even afford daily meals. So, she decides to marry a "rich" man, regardless of social status! To learn more about men, she asks her butler, Lucas, for lectures, but he keeps interfering with her search for a husband. Moreover, it seems he has a secret... A doting and obsessive love from a high-spec butler. A miraculous Cinderella love story for a poor young lady! https://www.cmoa.jp/title/293054/