Busa Neko ni Kaerareta Kiyowa Reijou desu ga, Saikyou no Gunjin Koushaku ni Hirowarete Kizetsu Sunzen desu

Also known as: ブサ猫に変えられた気弱令嬢ですが、最恐の軍人公爵に拾われて気絶寸前です, A Timid Lady was Turned into an Ugly Cat, but on the Verge of Fainting is Picked up by the Most Fearsome Military Duke

by Ema Okadachi

Cursed to be an ugly cat--but maybe you're happy! "I'll have you turn into a cat, sister." Marie, the viscount's young daughter, lost her fiancé to her younger sister Emilia and has been cursed even more. Her reflection in the mirror - an ugly cat! Running away from her sister for her life, Marie, who escaped from their house, collapsed from loneliness and hunger, unable to speak. Then, a kind hand reaches out to her, "In the middle of this rain, poor thing...Would you like to come with me?" The figure is the "ruthless, merciless, undefeated duke" rumored even in social circles. An unfortunate girl gets her one and only happiness, and a happy cat life begins!