Noroware Saijo no Karisome Konyaku - Dare kara mo Aisarenaku Natta Hazu ga Akugyaku Koushaku ni Dekiaisareteimasu

"I'm going to put a curse on you." Lizley, a magic formula artist, was cursed by her beloved sister with the words "I'm going to put a curse on you," meaning she will never be loved by anyone. Though she just wants to be useful to others, the curse has made everyone around her dislike her. While Lizley wonders if her days will continue like this, one day she meets a young man known as the Evil Duke... A pure love fantasy about an evil duke who hates curses and a talented girl who is cursed!

https://www.cmoa.jp/title/304686/