I Saved The Cursed Duke

Briefly about I Saved The Cursed Duke manga: 

Asteria, who lives to protect the grave of the gods. One day, a man suddenly appears before her who is on the verge of death, disrupting her peaceful life. This man is none other than Duke Erhardt, the most beautiful and youngest governor of the empire. Asteria saves the dying Duke by using her magical powers, but her magical powers can only be preserved if they are together. At Erhardt’s request, she entered the outside world and became a fake duchess. Will Asteria, who slowly adapts to her new life, be able to achieve love and break the curse?!