Find The Crown summary:

For centuries, the grim reaper Ari guided souls to the afterlife, feeling lonely because no one could see her head. One day, a human named Woo-chul, who can see her head, offers to help find it. Can Ari find her head and ease her loneliness? This is the romance drama of Ari and Woo-chul, crossing between the realms of the living and the dead.