DEVIL'S MARK BEARER NORA PROLOGUE

The MC and Nora was a childhood friends. They promised to each other to grow stronger together. After the promise made Nora and the MC start dating and after three years while they're peacefully eating at the restaurant a random man suddenly gave them a letter from their master. Their master asked them to do a dangerous quest that leads Nora to being cursed by the devil. Now do you think the mc will be able to cure and save her? or the curse will be able to fully took control of her?