I absolutely love it. I've read all the mangas done by nagabe, and I can't express enough how much I love these kind of stories. It's really similar to "The Ancient Magus Bride" (As that anime was inspired by this). A demonic (or cursed creature if you will), shunned and hated, meets a person who accepts him for what he is. They create a close bond, help each other...appreciate each other's company. Not to mention the artstyle is just perfect! I really, really love these kind of "forbidden love" stories in general where humans or so go beyond a creature's appearance and touch their heartsand become close. The only person who accepts them.
If you enjoyed watching this, give the mangas a go! There are a total of 8 volumes at the moment since this review is placed.