Konyaku Hakisareta no de Osouji Maid ni Nattara Warawanai Kikoushi-sama ni Dekiaisaremashita

Viscount’s daughter Mithril is rejected and has her engagement broken off for being “unattractive as a woman.” With the broken engagement also comes the loss of financial support, and to protect her family’s livelihood, Mithril takes a job as a cleaning maid for the Mage Corps! The Mage Corps is rumored to be full of highly eligible men, but Mithril ignores all that and focuses on diligently doing her work. However, what she doesn’t notice is that the stoic mage who never smiles—and who is normally uncomfortable around women—is slowly falling for her…!?

Credit: https://www.cmoa.jp/title/284745/